Question

Find the value of the polynomial 3

3 − 4

2 + 7 − 5, when x = 3 and also

when x = -3.​

Answer 1

Step-by-step explanation:

let p(x)=3x³-4x²+7x-5

At x=3,p=(3)=3(3)³-4(3)²+7(3)-5=3×27-4×9+21-5=3(-3)-4(-3)2+7(-3)-5=3( -27)-4×9-21-5=-81-36-21-5=-143p(-3)=-143 hence the value of the given polynomial at x=3 and x=-3are 61 and -143 respectively