Question

решите уравнение: x(x-1)-(3+x)x=4

Answer 1

x^2 - x - 3x - x^2 = 4 
- 4x = 4 
x = - 1

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Answer 2

x^2 - x - ( x^2 + 3x) = 4
x^2 - x - x^2 - 3x = 4
- 4x = 4
4x = - 4
x = - 1