4(x+y)^2-9(x-y)^2因式分解,
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4(x+y)^2-9(x-y)^2因式分解,
![4(x+y)^2-9(x-y)^2因式分解,](/uploads/image/z/3200080-40-0.jpg?t=4%28x%2By%29%5E2-9%28x-y%29%5E2%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%2C)
利用平方差公式:a²-b²=(a+b)(a-b)
4(x+y)²-9(x-y)²
=[2(x+y)]²-[3(x-y)]²
=[2(x+y)+3(x-y)][2(x+y)-3(x-y)]
=(5x-y)(-x+5y)
看完了采纳哦~~
4(x+y)²-9(x-y)²
=[2(x+y)]²-[3(x-y)]²
=[2(x+y)+3(x-y)][2(x+y)-3(x-y)]
=(5x-y)(-x+5y)
看完了采纳哦~~