6(a+b)²-9(a-b)²因式分解,

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6(a+b)²-9(a-b)²因式分解,
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6(a+b)²-9(a-b)²因式分解,
6(a+b)²-9(a-b)²因式分解,

6(a+b)²-9(a-b)²因式分解,
=6*(a²+2ab+b²)-9*(a²-2ab+b²)
=6a²+12ab+6b²-9a²+18ab-9b²
=-3a²+30ab-3b²
=-3(a²-10ab+b²)

6(a+b)²-9(a-b)²
=6a²+12ab+6b²-9a²+18ab-9b²
=-3a²+30ab-3b²
=-3(a²-10ab+b²)