Thread: Functions

If f(x) =2x^3 + Ax^2 + 4x - 5 and f(2) = 5, what is the value of A?

I keep getting = -31\2 but the correct answer is -7/2
how do I get that? :| thank you

Originally Posted by cokeclassic

If f(x) =2x^3 + Ax^2 + 4x - 5 and f(2) = 5, what is the value of A?

I keep getting = -31\2 but the correct answer is -7/2
how do I get that? :| thank you

means





from here, simple arithmetic will get you the right answer (-7/2). want to try?

Oh opps... I multiplied 2 x 2 first

Thank you