Question

решите уравнения (x+3)²-x = (x-2)(2+x)

Answer 1

x²+6x+9-x = x²-4
x²+5x+9 = x²-4
4 = x²-x²-5x-9
4 = -5x-9
4+9 = -5x
13 = -5x
x = 13/-5
x = 2.6