观察等式:4x²-5x-6=(x-2)(4x+3),2x²+7x+6=(2x+3)(x+2),分解因式:-5x+7x+6

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观察等式:4x²-5x-6=(x-2)(4x+3),2x²+7x+6=(2x+3)(x+2),分解因式:-5x+7x+6
观察等式:4x²-5x-6=(x-2)(4x+3),2x²+7x+6=(2x+3)(x+2),分解因式:-5x+7x+6

观察等式:4x²-5x-6=(x-2)(4x+3),2x²+7x+6=(2x+3)(x+2),分解因式:-5x+7x+6
4x² - 5x - 6 =4x² + 3x - 8x - 6 = x(4x - 3) - 2(4x - 3) = (x-2) (4x+3)
2x² + 7x + 6 = 2x² + 3x + 4x + 6 = x(2x + 3) + 2(2x + 3) = (2x+3) (x+2)
-5x² + 7x + 6 = -5x² - 3x + 10x + 6 = -x(5x + 3) + 2(5x + 3) = (5x+3) (-x+2)

-5x^2+7x+6=(-x+2)(5x+3)