Question

Shandra has a sheet of cardboard whose area is x2 + 2x − 15 square inches. We know that the length of the cardboard sheet is (x + 5) inches. What is its width?

Answer 1

Answer:

b=x-3

Step-by-step explanation:

$area \: of \: sheet = {x}^{2} + 2x - 15 \\ length \: of \: sheet =l = x + 5 \\ breadth \: of \: sheet \: = b \\ area \: of \: sheet = lb \\ {x}^{2} + 2x - 15 \: =( x + 5)b \\ b =( {x}^{2} + 2x - 15) \div (x + 5)$

After this do the division as shown in the picture.

Therefor,b=x-3