36(x+y)²-49(x-y)²
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36(x+y)²-49(x-y)²
36(x+y)²-49(x-y)²
36(x+y)²-49(x-y)²
36(x+y)²-49(x-y)²
=[6(x+y)-7(x-y)][6(x+y)+7(x-y)]
=(6x+6y-7x+7y)(6x+6y+7x-7y)
=(13y-x)(13x-y)
平方差公式:
原式=(6x+6y)^2-(7x-7y)^2
=(6x+6y+7x-7y)(6x+6y-7x+7y)
=(13x-y)(13y-x)
利用平方差公式
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)]
=(6x+6y+7x-7y)(6x+6y-7x+7y)
=(13x-y)(13y-x)=(6x+6y-7x+7y)(6x+6y+7x-7y) =(13y-x)...
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利用平方差公式
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)]
=(6x+6y+7x-7y)(6x+6y-7x+7y)
=(13x-y)(13y-x)
收起
36(x+y)²-49(x-y)²
=(6x+6y)²-(7x-7y)²
=(6x+6y+7x-7y)*(6x+6y-7x+7y)
=(13x-y)*(13y-x)
因式分解:36(x+y)²-49(x-y)²
36(x+y)²-49(x-y)²急用
36(x+y)²-49(x-y)²
49+14x+x²-y²
x²-y²-x-y因式分解
一:(x²+1)y²-x²-1二:-49x²+14x-1+y²
因式分解36(x-y)²-49(x+y)²
36(x+y)²-49(x-y)²怎么用公式法分解因式
x²-5x-y²-5y=0,x²+xy+y²=49
已知(x+y)²=1,(x-y)²=49,求x²+y²与xy的值.
因式分解-49x²+14x-1+y²
-49x²+14x-1+y²分解因式
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