# 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?

Jul 11, 2017

Area $= \text{length"xx"breadth} = \left(x + 3\right) \left(x - 3\right) = 40$

$\implies {x}^{2} - 9 = 40$

$\implies {x}^{2} = 49$

$\implies x = 7$

So length =(7+3)=10unit