Question 124364
Start with the formula for the area of a rectangle:
{{{A = L*W}}}
The area, A, is given as:{{{A = x^2+50x}}}
The width is given as:{{{W = x}}}
Find L:
{{{A = L*W}}}
{{{x^2+50x = L*x}}} Factor an x from the binomial on the left side then divide both sides by x.
{{{x(x+50) = L*x}}} Divide by x.
{{{x+50 = L}}}
The length is represented by the binomial{{{x+50}}}