Question

Find the value of the polynomial f(x) = x2 – 4x + 7 at x = – 1

Answer 1

Step-by-step explanation:

Given polynomial is p(x)=4x

2

−3x+7

We need to find value of polynomial at x=1.

Then put the value of x=1 in the given polynomial, we get

p(x)=4(1)

2

−3(1)+7

⇒p(x)=4×1−3×1+7

⇒p(x)=4−3+7

⇒p(x)=11−3=8

So, value of polynomial is 8.

Answer 2

Answer:

12

Step-by-step explanation:

p(x) = x^2-4x+7

so if we replace x by -1  it will be,

p(-1) = -1^2-4*-1+7

      = 1+4+7

      = 12

Therefore, your answer is 12