Question

Are a of a sail. The area in square meters for a triangular sail is given by A(x) = x2 + 5x + 6.
a) Find A (5).

b) If the height of the sail is x +3 meters, then what is the length of the base of the sail?

Answer 1

For the first problem don't you replace all the x with 5 and solve?

Answer 2

A(5)=5^2+5*5 + 6

On the second part,

1/2 b*h=answer in first part, solve for b.