Question

(2-x)(2x+1)=(2+x)(x-2)​ срочноооо

Answer 1

Решение:

$(2-x)(2x+1)=(2+x)(x-2)\\4x + 2 - 2x^2 - x = x^2 - 4\\-2x^2 - x^2 + 4x - x +2 + 4 = 0\\-3x^2 + 3x + 6 = 0 |: (-3)\\x^2 - x - 2 = 0\\(x+1)(x-2) = 0\\x_1 = -1\\x_2 = 2$