Объяснение:
12+(5x + 3x²)-(3x² - (-2x)=0.
12+ 5x + 3x^2 - 3x^2 - 2x=0
3x = - 12
x = -12 :3
x = - 4
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Объяснение:
12+(5x + 3x²)-(3x² - (-2x)=0.
12+ 5x + 3x^2 - 3x^2 - 2x=0
3x = - 12
x = -12 :3
x = - 4