Question

(2x-3)в 2степени - (2x+3) в 2 степени = 87 решить

Answer 1

(2x - 3)^2 - (2x+  3)^2 = 87
4x^2 - 12x + 9 - (4x^2 + 12x + 9) = 87
4x^2 - 12x + 9 - 4x^2 - 12x - 9 = 87
- 24x = 87
x = - 87/24
x = - 3,625