Math 3 Honors 2nd Period
The error in this problem is (-x)^2 which should be a postitive x^2. The reason it is wrong in the equation is because you are suppose to raise (-x)^2 , which looks like (-x)(-x) which equals a positive x^2.
After you label the sides of your trapezoid, you then plug it into your formula
A=1/2 h (b1+b2). When you get your answer you then use your answer and use it in the quadratic formula. So your dimensions are 5 and -6.