A rectangle has a length of (x+5) and a width of (x-7). Write an equation for the area of the rectangle (use a for area). Simplify the equation completely. Hint: in the final answer, a equals a trinomial.

x^2 -2x-35

Step-by-step explanation:

A = l*w

 = (x+5) (x-7)

Foil

x^2 + -7x+5x -35

Combine like terms

x^2 -2x-35

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.