Question

the width of a rectangle is three less than the length. if the area of the rectangle is 88 square cm, find the dimensions of the rectangle

Answer 1

Let the length be l
Then, 
l *(l-3)= 88
l²-3l =88
l²-3l-88=0
l²-11l +8l -88 =0
l(l-11) + 8(l-11) =0
(l+8)(l-11)=0
As, l can't be negative, length=11cm and width=(l-3)=11-3 =8 cm