Помогите пожалуйста решить номер 87

y = 2x - 11 (x-y)(x+y) = 32 (x - 2x+11)(x + 2x-11) = 32 (-x+11)(3x-11) = 32 -3x² + 44x - 121 - 32 = 0 3x² - 44x + 153 = 0 D=44²-4*3*153=4(121*4-153*3)=4*25=10² x(1;2) = (44±10)/6 x1 = 9 x2 = 17/3 y1 = 18-11 = 7 y2 = (34-33)/3 = 1/3 --------------------------- (9; 7); (17/3; 1/3) 9a + 7 = 6 9a = -1 ---> a = -1/9 не целое))) (17a/3) + (1/3) = 6 17a + 1 = 18 17a = 17 a=1