Question

Mr. Smith has a square sheet of glass in his garage. He plans to cut 3 inches off of the sheet along the width to use it for a window. The new area of the glass is given by the expression below, where x is the side length, in inches, of the original sheet of glass.

Answer 1

The area removed from the sheet of glass after being cut
The area of the sheet of glass after being cut is= x^2 -3x

Answer 2

Answer:

Mr. Smith has a square sheet of glass in his garage.

Its side length is 'x'

He plans to cut 3 inches off of the sheet along the width to use it for a window.

So, he will cut 3x from the original (width x original glass side)

$3\times x=3x$

Area of original square = $x\times x=x^{2}$

Hence, the area of the sheet of glass after being cut is= $x^{2} -3x$