Question

The length of a rectangular table is 3 feet longer than its width, x. There area of the table is 50 square feet . What equation can be used to find the width of the table?

A) x^2 + 3x -50 = 0
B) x^2 + 3x + = 0
C) 2x + 53 = 0
D) 4x + 50 = 0

Answer 1

Let x represent the width.

(3+x)(x) = 50

Expand.

3x+x^2 = 50

Bring 50 to the other side.

3x+x^2-50=0

The answer is A).