Question

A rectangle has a length of x+3 and a width of x-3, and has an area of 40 square units. How do you find the length and width of the rectangle?

Answer 1

hope it will help you

Answer 2

Answer:

Length is 10 meter and width is 4 meter.

Step-by-step explanation:

Length= x+3; Width= x-3

Area of rectangle=40 sq unit

Area of rectangle=Length*Width

40=(x+3)(x-3)           :Using identity (a+b)(a-b)=a^2 - b^2

40=x^2 - (3)^2

40=x^2 - 9

x^2=49

x=7 units.

Therefore:- Length= x+3 = 7+3 = 10 units.

                   Width=   x-3  = 7-3  = 4 units.