×^2-4×+35=-9×^2+11×+45

х² - 4х + 35 + 9х² - 11х - 45 = 010х² - 15х - 10 = 02х² - 3х - 2 = 0D  = 3² - 4*2*(-2) = 9 + 16 = 25х1 = (3 - 5)/2*2 = -0,5х2 = (3+5)/2*2 = 2