Question

(у+2)(у-6)+(у+3)(у-4)

Answer 1

y² - 6y + 2y - 12 + y² - 4y + 3y - 12 = 0;

2y² - 5y - 24 = 0;

D = 25 - 4 * 2 * (-24) = 217;

y1 = (5-√217)/4;

y2 = (5+√217)/4.