Question

решите уравнение (x-3)²-x(x+2)=21

Answer 1

x^2-6x+9-x^2-2x-21=0
-8x=12
x=-1,5

Answer 2

x^2 - 6x + 9 - x^2 - 2x = 21
-8x = 12
x = -12 / 8 = -3/2