Question

if f(x)=2x^3+Ax^2+Bx-5 and if f(2)=3 and f(-2)=-37, what is the value of A+B?

A)-6
B)-3
C)-1
D)2
E)Cant be determined

Answer 1

f(2)=11 + 4 A + 2 B = 3
f(-2)=-21 + 4 A - 2 B = -37

Answer 2

Solve the two equations for A and B

Answer 3

You find
A=-3
B=2

Answer 4

A+B =-3+2=-1

Answer 5

Thank you very much

Answer 6

yw