Решите уравнение к задачи. 15х(х+2)+6х(х-2)=22(х-2)(х+2)
15X^2 + 30X + 6X^2 - 12X = 22*(X^2-4)
21X^2 + 18X = 22X^2 - 88
22X^2 - 21X^2 - 88 - 18X = 0
X^2 - 18X - 88 = 0
D = 324 - 4*1*(-88) = 324 + 352 = 676
V D = 26
X1 = 18 + 26 \ 2 = 22
X2 = 18 - 26 \ 2 = - 8 \ 2 = - 4
15х(х+2)+6х(х-2)=22(х-2)(х+2)