3x^2-6x=360 x=?

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3x^2-6x=360x=?3x^2-6x=360x=?3x^2-6x=360x=?(3x+20)(x-12)=0所以x=12或x=-20/33x^2-6x=360x^2-2x-120=0(x-12)

3x^2-6x=360 x=?
3x^2-6x=360 x=?

3x^2-6x=360 x=?
(3x+20)(x-12)=0
所以 x=12 或 x=-20/3

3x^2-6x=360
x^2-2x-120=0
(x-12)(x+10)=0

x=12 x=-10

3x² - 6x = 360
x² - 2x = 120
x² - 2x + 1 = 120 + 1
(x - 1)² = 121
x = 1 ± 11
x = 12 或 -10

x^2-2x-120=0
(x-12)(x+10)=0
x=12 x=-10