Question 174348
    If the area of the rectangular is 645ft and the length is 12ft larger than the width find its length and its width. please solve in step by step.
.
Let w = width
then
w+12 = length
.
w(w+12) = 645
w^2+12w = 645
w^2+12w-645 = 0
.
Solving via the quadratic equation yields:
w = {20.096, -32.096}
.
Toss out the negative solution we are left with:
width = 20.096 feet
length = 20.096+12 = 32.096 feet
.
Details of quadratic follows:
*[invoke quadratic "x", 1, 12, -645 ]