先阅读再解题 因式分解x²-4x+3解x²-4x+3=x²-4x+4-1=(x-2)²-1=(x-2+1)(x-2-1)=(x-1)(x-3)仿照上述方法分解因式x²-7x-30
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![先阅读再解题 因式分解x²-4x+3解x²-4x+3=x²-4x+4-1=(x-2)²-1=(x-2+1)(x-2-1)=(x-1)(x-3)仿照上述方法分解因式x²-7x-30](/uploads/image/z/14673983-23-3.jpg?t=%E5%85%88%E9%98%85%E8%AF%BB%E5%86%8D%E8%A7%A3%E9%A2%98+%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3x%26%23178%3B-4x%2B3%E8%A7%A3x%26%23178%3B-4x%2B3%3Dx%26%23178%3B-4x%2B4-1%3D%28x-2%29%26%23178%3B-1%3D%EF%BC%88x-2%2B1%EF%BC%89%28x-2-1%29%3D%28x-1%29%28x-3%29%E4%BB%BF%E7%85%A7%E4%B8%8A%E8%BF%B0%E6%96%B9%E6%B3%95%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8Fx%26%23178%3B-7x-30)
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先阅读再解题 因式分解x²-4x+3解x²-4x+3=x²-4x+4-1=(x-2)²-1=(x-2+1)(x-2-1)=(x-1)(x-3)仿照上述方法分解因式x²-7x-30
先阅读再解题 因式分解x²-4x+3
解x²-4x+3=x²-4x+4-1=(x-2)²-1=(x-2+1)(x-2-1)=(x-1)(x-3)仿照上述方法分解因式x²-7x-30
先阅读再解题 因式分解x²-4x+3解x²-4x+3=x²-4x+4-1=(x-2)²-1=(x-2+1)(x-2-1)=(x-1)(x-3)仿照上述方法分解因式x²-7x-30
x²-7x-30=(x-7/2)^2-(13/2)^2=(x-7/2+13/2)(x-7/2-13/2)=(x+3)(x-10)