class ix mathematics worksheet chapter 2: polynomials very short
VERY SHORT ANSWER TYPE QUESTIONS. Q1. Write an example of an algebraic expression that is not a polynomial. Q2. p(x) = √ . 3
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Chap 2 : Polynomials www.rava.org.in
Get all GUIDE and Sample Paper PDFs by whatsapp from +91 89056 29969 Page 9CHAPTER CHAPTER 22
1. OBJECTIVE QUESTIONS
1. Factors of xx12
42are (a) ,,xxx22 3 2 ^^^hh h (b) ,,xxx33 2 2 ^^^hh h (c) ,,xxx22 3 2 ^^^hh h (d) ,xx26 22
^^hh
Ans : (a) ,,xxx22 3
2 ^^^hh hWe can find two numbers p and q such that
qp1and pq12.The numbers are
4 and 3.
xx12 42xxx4312 422
xx x43 4 22 2
^^hh xx43 22
^^hh xxx22 3 2 ^^^hhh 2. If xxxyx1 1 22
2 bl, then the value of y is (a)
2 (b) 2
(c) x2 (d) x2Ans : (a) 23. x abcxabbc
2 ^h (a) xaxbc^^hh (b) xaxac^^hh (c) xbxac^^hh (d) xbxbc^^hhAns : (c) xbxac^^hh
x abcxabbc 2 ^h xacxbxbac 2 ^^hh xbxacxb 2 ^^hh xx b a c x b ^^^hhh xbxac^^hh4. Factorisation of ab
xx22 is (a) abab xxxx ^^hh (b) ab xx2 ^h (c) abab xx22 ^^hh (d) abab xx22 ^^hhAns : (a) abab
xxxx ^^hh ab xx22 ab xx22 ^^hh abab xxxx ^^hh5. Which one of the following algebraic expressions is a
polynomial in variable x? (a) xx2 2 2 (b) xx1(c) xxx3 /232 (d) None of theseAns : (c) xxx3
/232 xxx3 /232 can be written as xx3 2 , which is a polynomial in x.6. If one factor of
xx58 4 2 is ()x21, then the
second factor is (a) ()x52 (b) ()x25 (c) ()x52 (d) ()x52Ans : (c) ()x52
7. Degree of the polynomial px^hxx367
4 is (a) 4 (b) 5 (c) 3 (d) 1Ans : (a) 4
The highest power of the variable
x is 4. So, the degree of the polynomial is 4.8. If one factor of
()a x y z bx by bz is (),xyz then the second factor is (a) ax ay az (b) bx by bz (c) bx by bz (d) abAns : (d) ab
Add 89056 29969 in Your Class Whatsapp Group to Get All PDF Files.9. Degree of the polynomial px x x22^^ ^hhh is
(a) 2 (b) 1 (c) 0 (d) 3Ans : (a) 2
px^h xx22^^hh x4 2 The highest power of the variable x is 2. So the degree of the polynomial, ()px210. If xx887
42is divided by x21, the remainder is (a) 211
(b) 213
(c) 215
(d) 217
Ans : (a)
211Let, px^h xx887
42So, the remainder when px^h is divided by x21 is
p21bl 8218217 42bbll 211
11. If abc0, then abc
333(a) abc (b) abc3 (c) abc2 (d) abc3
File Revision Date :
For NCERT Solutions Previous Years Chapterwise QB
visit www.cbse.online or whatsapp at 8905629969 Download all GUIDE and Sample Paper pdfs from www.cbse.online or www.rava.org.in Page 10Chap 2 : Polynomials www.cbse.online
Ans : (b) abc3We know that,
abc abc3 333abca b c abbcca 222
^^hh
If abc 0, then abc
333abc3.
12. For the polynomial px x x x x45 1
532^h, one of the factors is (a) x1 ^h (b) x1^h (c) x (d) x2^h
Ans : (b) x1^h
px^h xxxx45 1 532p1 ^h 14511 0
Hence,
x1 is the solution of px ^h.13. In the method of factorisation of an algebraic
expression, which of the following statement is false? (a) Taking out a common factor from two or more terms. (b) Taking out a common factor from a group of terms. (c) Using remainder theorem. (d) Using standard identities.Ans : (c) Using remainder theorem.
Remainder theorem is not used for factorisation of an algebraic expression.14. If x2, y1, then the value of xxyy44
22is (a) 0 (b) 1 (c)
1 (d) 2
Ans : (a) 0
15. Factorisation of ab abbcca2
22^h is (a) abab c2 ^^hh (b) bcca b2^^hh (c) caab c2^^hh (d) babc a2^^hh
Ans : (a) abab c2^^hh
ab abbcca2 22^h ab ab bcca22 22
^h ab cab2 2 ^^hh abab c2^^hh
16. Factors of
z yxzyx36 113123 2 aakk ()zyx zyx4344953 2 bl are (a) ()xzyx143449 bl (b) ()xzyx143449 bl (c) ()xzyx143449 bl (d) ()xzyx143449 blAns : (a) ()xzyx143449
bl17. If x2 and xy xy35
22, then find (a)
2 (b) 3
(c)4 (d) 9
Ans : (b) 3
Value of
xy xy3 225 and x2
yy26 22^h 5 yy69 2 0 y3 2 ^h 0 y3 0 y 3
Download All PDF fi les from www.rava.org.in.
18. Expansion of xx1
2 bl is (a) xxx21 2 2 (b) xxx21 2 2 (c) xx21 2 2 (d) xx21 2 2Ans : (c) xx21
2 219. Factors of polynomial xx x31024
32are (a) ()()()xxx234 (b) ()()()xxx234 (c) ()()()xxx234 (d) ()()()xxx234
Ans : (a) ()()()xxx234
20. If xx15
, then find the value of xx1 2 2 (a) 26 (b) 23 (c) 30 (d) 22Ans : (b) 23
xx1 5 xx1 2 bl 5 2 ^h xxxx211 22^bbhll 25
xx21 2 2 25
or xx1 2 2 23
21. Factorisation of xx32 4
2 is (a) xx22 2 ^^hh (b) xx22 2^^hh (c) xx22 2^^hh (d) xx22 2^^hhAns : (a) xx22 2^^hh
xx32 4 2 xxx22 2 4 2 xx x22 2 22^^hh xx22 2^^hh22. The values of a and b so that the polynomial
xax xb13 32is divisible by ()x1 and ()x3 are (a) ,ab15 3 (b) ,ab012 (c) ,ab315 (d) ,ab12 0
Chap 2 : Polynomials www.rava.org.in
Get all GUIDE and Sample Paper PDFs by whatsapp from +91 89056 29969 Page 11Ans : (b) ,ab012
23. Factorisation of xaa12
22is (a) xa xa11 ^^hh (b) xa xa11 ^^hh (c) xa xa11 ^^hh (d) xa xa11 ^^hh
Ans : (b) xa xa11 ^^hh
xaa12 22xaa12 22
^h xa1 22
^h xa xa11 ^^hh
24. Factors of ababa
2 are (a) ()()aba1 (b) ()()aba1 (c) ()()aba1 (d) ()()aba1Ans : (b) ()()aba1
25. Which of the following algebraic expressions is not a
polynomial ? (a) xx2173 2 (b) xx73 8 /323 (c) 3 (d) 0Ans : (b) xx73 8
/323The expression xx73 8
/323 is not a polynomial as second term has fractional exponent /2326. Factors of xx42
2 ^h are (a) ,xx76 ^^hh (b) ,xx76^^hh (c) ,xx76^^hh (d) ,xx76^^hhAns : (c) ,xx76^^hh
xx42 2 xxx42 7 6 2 xx x76 6 ^^hh xx67^^hhDownload All PDF fi les from www.rava.org.in.
27. The polynomials ax x33
quotesdbs_dbs21.pdfusesText_27[PDF] extra questions for class 9 science chapter 1
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