Question

Please help! I need this fast

Rhett decides to build a square room for his movie and music collection. If the area of the room is 4x2 + 28x + 49 square feet, what is the length of one side of the room?

(7x + 2) feet
(2x + 7) feet
(2x − 7) feet
(7x − 2) feet

Answer 1

(2x + 7) feet

Explanation:

I'm guessing the expression there is

4x² + 28x + 49

4x² +14x +14x +49

Factorize

2x ( 2x + 7) +7( 2x + 7)

(2x + 7)²

Area = (side)1

One side is (2x +7)