Question

Find the value of polynomial p(x) =2x2 + 5 at x= 2.​

Answer 1

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Given: P(x)=x

2

−2x+5

Forx=−1, P(−1)=(−1)

2

−2(−1)+5=1+2+5=8

For x=5, P(5)=(5)

2

−2(5)+5=25−10+5=20

Hence P(−1)=8 and P(5)=20