Question

I’m really having trouble on this problem, can anyone PLEASE help me!! This is due today and I would like someone to explain to me, how they got their answer !! Thank you so so much !!

Answer 1

expression 3

Explanation:

Using the formula for calculating the area

with h = 2x - 4 = 2(x - 2),
`b_(1)` = 7 and
`b_(2)` = 2x + 12

A =
`(1)/(2)` × 2(x - 2)(7 + 2x + 12)

= (x - 2)(2x + 19) ← expand factors using FOIL

= 2x² + 19x - 4x - 38

= 2x² + 15x - 38 → 3