因式分解 9(2a+3b)²-4(3a-2b)²
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因式分解9(2a+3b)²-4(3a-2b)²因式分解9(2a+3b)²-4(3a-2b)²因式分解9(2a+3b)²-4(3a-2b)²原
因式分解 9(2a+3b)²-4(3a-2b)²
因式分解 9(2a+3b)²-4(3a-2b)²
因式分解 9(2a+3b)²-4(3a-2b)²
原式=(6a+9b)²-(6a-4b)²
=[(6a+9b)+(6a-4b)][(6a+9b)-(6a-4b)]
=13b(12a+5b)
9(2a+3b)²-4(3a-2b)²
=[3(2a+3b)+2(3a-2b)][3(2a+3b)-2(3a-2b)]
=13b(12a+5b)
9(2a+3b)²-4(3a-2b)²
=[3(2a+3b)]²-[2(3a-2b)]²
=[3(2a+3b)+2(3a-2b)][3(2a+3b)-2(3a-2b)]
=(12a+5b)(6a+13b)