Question 222115
(2x+120)(2x+53)=9000 
I have this: 
9000=4x^2+240x+106x+6360
9000-9000=4x^2+346x+6360-9000
0=4x^2+346x+2640 *** - 2640, not +
2x^2 + 173x - 1320 = 0
It doesn't factor.
*[invoke solve_quadratic_equation 2,173,-1320]