Question

Lf f(x) = 4x³ + Ax² + 7x − 1 and f(2) = 7, what is the value of A?​

Answer 1

4(2)³+A×2²+7(2)-1=7

4×8+4A+14-1=7.

32+14-1-7=-4A..

38=-4A.

A=38/-4.

A=-9½