(5a²-3b²)-3(a²-b²)-(-b²),其中a=3,b=-2化简
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![(5a²-3b²)-3(a²-b²)-(-b²),其中a=3,b=-2化简](/uploads/image/z/3952937-65-7.jpg?t=%285a%26%23178%3B-3b%26%23178%3B%29-3%28a%26%23178%3B-b%26%23178%3B%29-%28-b%26%23178%3B%29%2C%E5%85%B6%E4%B8%ADa%3D3%2Cb%3D-2%E5%8C%96%E7%AE%80)
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(5a²-3b²)-3(a²-b²)-(-b²),其中a=3,b=-2化简
(5a²-3b²)-3(a²-b²)-(-b²),其中a=3,b=-2化简
(5a²-3b²)-3(a²-b²)-(-b²),其中a=3,b=-2化简
(5a²-3b²)-3(a²-b²)-(-b²)
=5a²-3b²-3a²+3b²+b²
=(5a²-3a²)+(3b²-3b²+b²)
=2a²+b²
=2x(3)²+(-2)²
=18+4
=22
=2a²-3a²-3b²+b²
=-2b²-a²