Question

The width of a rectangle is the length minus 7 units. The area of the rectangle
is 8 units. What is the length, in units, of the rectangle?

Answer 1

Answer:

l=8

Step-by-step explanation:

w=l-7

Area=l*(l-7)=8 u

l^2-7l-8=0

l^2- 8l+l-8=0

l(l-8)+l-8=0

(l-8)*(l+1)=0

l-8=0  ,   l=8  or

l+1=0,   l=-1 impossible

so l=8