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

Area `="length"xx"breadth"=(x+3)(x-3)=40`

`=>x^2-9=40`

`=>x^2=49`

`=>x=7`

So length =(7+3)=10unit

breadth =(7-3)=4unit