(px+q)(2x+5)=6x^2+11x+r
Find p, q, and r
I know r is 3, but I can't figure out the rest.
(px + q)(2x + 5) = 6x² + 11x + r
2px² + 5px + 2qx + 5q = 6x² + 11x + r
---> 2px² = 6x² ---> p = 3
---> 5px + 2qx = 11x ---> 5p + 2q = 11
---> Since p = 3, 5(3) + 2q = 11
---> 15 + 2q = 11
---> 2q = -4
---> q = -2
---> 5q = r
---> Since q = -2, 5(-2) = r
---> r = -10