Ответ:
9) 3x(2x + 1) - x (6x - 1) = 10
6x^2 + 3x - 6x^2 + x = 10
4x = 10
x = 2.5
10) x(4x - 2) - 2x(2x + 4) = 4
4x^2 - 2x - 4x^2 - 8x = 4
-10x = 4
x = - 2/5
x = -0,4
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Ответ:
9) 3x(2x + 1) - x (6x - 1) = 10
6x^2 + 3x - 6x^2 + x = 10
4x = 10
x = 2.5
10) x(4x - 2) - 2x(2x + 4) = 4
4x^2 - 2x - 4x^2 - 8x = 4
-10x = 4
x = - 2/5
x = -0,4
6х^2+3х-6х^2+х=10
6х^2-6х^2 сокращаются и тогда остаётся
3х+х=10
4х=10
Х=10/4
Х=5/2