16(x+y)²-25(x-y)² 因式分解
1个回答
16(x+y)²-25(x-y)²
=[4(x+y)-5(x-y)][4(x+y)+5(x-y)]
=(4x+4y-5x+5y)(4x+4y+5x-5y)
=(9y-x)(9x-y)
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25(x+y)^2-16(x-y)^2因式分解
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