Question

The length of a rectangular frame is 8 cm more than the width. The area inside the frame is 65 square cm. Find the width of the frame.

Answer 1

L+8=W
L*W=65
sub W from the first equation to second one
L*(L+8)= 65
L^2+8L =65   L^2+8L -65 =0  L=-13 and L=5, length cannot be negative so L=5 is the answer
sub this value in the first equation W=13