Question

Решите уравнение
(x2−1)3−(2x−3)7=7

Answer 1

Ответ:

$(x2 - 1)3 - (2x - 3)7 = 7 \\ (2x - 1) \times 3 - (14x - 21) = 7 \\ 6x - 3 - 14x + 21 = 7 \\ - 8x + 18 = 7 \\ - 8x = 7 - 18 \\ - 8x = - 11 \\ x = \frac{11}{8}$

Answer 2

Ответ:

• (x2-1) 3 - (2x - 3)7 =7 ; (2x -1)3- (14x- 21) = 7 ; 6x - 3 - 14x + 21= 7 ; - 8x + 18 = 7 ; - 8x= 7-18 ; - 8x = - 11 ; x=
• $\frac{11}{8}$