4m²-12mn+4m-6n+9n²-24因式分解
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4m²-12mn+4m-6n+9n²-24因式分解
4m²-12mn+4m-6n+9n²-24因式分解
4m²-12mn+4m-6n+9n²-24因式分解
4m²-12mn+4m-6n+9n²-24
=4m²-12mn+9n²+4m-6n-24
=(2m-3n)²+2(2m-3n)-24
=(2m-3n+6)(2m-3n-4)
原式=(2m-3n)^2+2(2m-3n)-24=(2m-3n+6)(2m-3n-4)
4m²-12mn+4m-6n+9n²-24=4m²-12mn+9n²+4m-6n-24=(2m-3n)²+2(2m-3n)-24=(2m-3n+6)(2m-3n-4)