Question

find the polynomial of p(x)=2+x+2x^2-x^3 at x=2
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Answer 1

Answer:

Given polynomial p(x)=2x

2

−3x+7a is zero polynomial if x is 2

Replace x by 2 we get

∴2(2)

2

−3(2)+7a=0

⇒2×4−3×2+7a=0

⇒8−6+7a=0

⇒2+7a=0

Add -2 both sides we get

2+7a−2=0−2

⇒7a=−2

Divided by 7 both side we get

a=−

7

2

So a=−

7

2

Answer 2

Explanation:

p(2)=2+2+(2*2)^2-2^3=4+4^0^3=4+4^0=4+1=5