2x^2+3x-2=0 D= 9 - 4 * 2 *(-2)= 25=5^2 x1 = -3+5/2=2/4=1/2 x2=-3-5/4=-8/4=-2 ОТВЕТ: x1= 1/2 x2= -2 (3-y)^2 2-3y = (3-y)(3+y)(2-3y)