Question

Помогите решить уравнение
(х-2)(х+2)=7х-14

Answer 1

(х-2)(х+2)=7х-14

x²-4=7x-14

x²-7x=4-14

x(x-7)=-10

x=-10 или х-7=-10

х=-10-7

х=-17

Ответ:-10; -17

Answer 2

${x}^{2} + 2x - 2x - 4 = 7x - 14 \ {x}^{2} - 7x + 10 = 0 \ d= 49 - 4 times 10 times 1 = 9 \ x (1) = frac{7 + 3}{2 times 1} = 5 \ x(2) = frac{7 - 3}{2 times 1} = 2$