Answer:
width=5inches
Step-by-step explanation:
Let the width =x
Then the length=x+3
Area of a rectangle=L×W, where Area=40inch²
Therefore we substitute the values of the dimensions into the formula
40=(x+3)(x)
40=x²+3x(grouping the terms together)
x²+3x-40=0(factorise the quadratic)
(x+8)(x-5)=0(find the zeros)
x+8=0,x=-8
x-5=0,x=5
Since the dimension, whether length or width cannot be negative,then x is 5inches hence width is 5 and length is 5+3=8inches
