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

Step-by-step explanation:

Here we are given a polynomial ,

And the value of ,

And we need to find out the value of A . Firstly substitute x = 2 in f(x) , we have ,

Simplify the exponents ,

Simplify by multiplying ,

Add the constants ,

Now from equation (i) , we have ,

Subtracting 19 both sides,

Simplify,

Divide both sides by 4 ,

Hence the value of A is -7/2.

i'm not entirely sure

step-by-step explanation:

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