Question

Решите уровнение пожалуйста! ​

Answer 1

Ответ:

3х+х=3-7

4х=-4

х=4-4

х=0

Answer 2

(3x - 7)*(2 + x) = (x + 3)*(2x - 1)

6x + 3x^2 - 14 - 7x = 2x^2 - x + 6x - 3

6x + 3x^2 - 14 - 7x - 2x^2 + x - 6x + 3 = 0

x^2 - 6x - 11 = 0

D = 6^2 - 4*(-11) = 80, $\sqrt{D}$ = 4$\sqrt{5}$

x1 = (6 - 4$\sqrt{5}$)/2 = 3 - 2$\sqrt{5}$

x2 =(6 + 4$\sqrt{5}$)/2 = 3 + 2$\sqrt{5}$