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

Answer 1

f(x) = 3x^3 + Ax^2 + 3x - 3

f(2) = 3(8) +A(4) + 3(2) - 3 = 5

24+6-3 + 4A = 5

27 +4A = 5

4A = 5-27 =-22

A = -22/4 = -11/2

A =-11/2

A=-5.5

3(2)^3 - 5.5(2)^2 + 3(2) -3 = 5

24 - 22 + 6-3 =5

2+3 = 5

5 = 5