Question

The area of a rectangle is x2 - 2x - 15 and the length of the rectangle is x + 3. Find the width of the rectangle.

Answer 1

divide by x+3 or make factors and cancel x+3
\[width=\frac{ x ^{2}-2x-15 }{ x+3 }=\frac{ x ^{2}-5x+3x-15 }{ x+3 }=?\]
complete it to make factors.