因式分解:36(x+y)²-49(x-y)²

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因式分解:36(x+y)²-49(x-y)²因式分解:36(x+y)²-49(x-y)²因式分解:36(x+y)²-49(x-y)²用平方差

因式分解:36(x+y)²-49(x-y)²
因式分解:36(x+y)²-49(x-y)²

因式分解:36(x+y)²-49(x-y)²
用平方差公式:
36(x+y)^2-49(x-y)^2
=[6(x+y)]^2-[7(x-y)]^2
=[6(x+y)+7(x-y)][6(x+y)-7(x-y)]
=(13x-y)(13y-x)