【2(a-b)²-(2a+b)(2a-b)+3a²】÷(a-b),其中a=-3,b=2.
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![【2(a-b)²-(2a+b)(2a-b)+3a²】÷(a-b),其中a=-3,b=2.](/uploads/image/z/3876108-60-8.jpg?t=%E3%80%902%28a-b%29%26%23178%3B-%282a%2Bb%29%282a-b%29%2B3a%26%23178%3B%E3%80%91%C3%B7%28a-b%29%2C%E5%85%B6%E4%B8%ADa%3D-3%2Cb%3D2.)
【2(a-b)²-(2a+b)(2a-b)+3a²】÷(a-b),其中a=-3,b=2.
【2(a-b)²-(2a+b)(2a-b)+3a²】÷(a-b),其中a=-3,b=2.
【2(a-b)²-(2a+b)(2a-b)+3a²】÷(a-b),其中a=-3,b=2.
【2(a-b)²-(2a+b)(2a-b)+3a²】÷(a-b)
=【2(a²+b²-2ab)-(4a²-b²)+3a²】÷(a-b)
=(2a²+2b²-4ab-4a²+b²+3a²)÷(a-b)
=(a²-4ab+3b²)÷(a-b)
=(a-b)(a-3b)÷(a-b)
=a-3b
=-3-3*2
=-9