Question

find the value of 5x² -3x+7 when.

1. x = 0,

2. x = 3,

3. x = -4,

4. x = 1 ÷ 2
​

Answer 1

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.