Question 101176
1. Start with the formula for the area of a rectangle:
{{{A = L*W}}} where L = the length and W = the width.
But, you are given the length as x so L = x.
And you are given the area as {{{3x^2+5x}}}, so {{{A = 3x^2+5x}}}, so now you can write:
{{{3x^2+5x = x*W}}} You can rewrite this as:
{{{x*W = x(3x+5)}}} Here, we factored an x.
So, to find W, divide both sides by x.
{{{W = 3x+5}}}