Question

Assignment -Unit 2
Class-9
Find the value of k for which (x+2) is a factor of the polynomial
2. if both x 2 and are factors of px - 5x , then show that per
3. -V5 find the value of ( *
4 x 257-161 and xy=-6, find the value of 3x - 5y
5 f b -c-6 and ab-bc+ca 11, find the value of apobiec
1793)
20-3b13 and ab-6, find the value of a'27"
7. Factorise (0) (a-b)(b-c-c-a)"
72x - 10x - 472
NE
250x432y
12/5x- 25-30
(1) (m 2n) 101(m+2n)*100
2x'*7x3x-18
8. Simplify (5a 3b)" - (5a-3b)'
9. #pbx)*5x+7, evaluate p(2)-pl-1)+pl)
10. The polynomial tox+3x'-8 and 3x®-5x+k are divided by x 2. If the remainder in each case is
find the value of k.
11. fab.c are all non-zero and a+b+c=0, prove that +=+ =3
12. What must be subtracted from p(x)=2x-2x-6x •x-5, so that the result is exactly divisible
2xx
21. What must be added to polynomial p[x]=x+2x2 -1 so that resulting polynomial
divisible by ***2x-37​

Answer 1

1)p(k)=x+2

(x+2=0

x=-2)

p(k)=-2+2

p(k)=0

12)p(x)=2x-2x-6x

(x-5=0

x=5)

p(5)=2(5)-2(5)-6(5)

p(5)=10-10-30

p(5)=-30

Answer 2

Answer:

1)p(k)=x+2

(x+2=0

x=-2)

p(k)=-2+2

p(k)=0

12)p(x)=2x-2x-6x

(x-5=0

x=5)

p(5)=2(5)-2(5)-6(5)

p(5)=10-10-30

p(5)=-30

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