(4a²-3b²)-[2(a²-1)+2b²-3] 化简下列式子
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(4a²-3b²)-[2(a²-1)+2b²-3]化简下列式子(4a²-3b²)-[2(a²-1)+2b²-3]化简下列
(4a²-3b²)-[2(a²-1)+2b²-3] 化简下列式子
(4a²-3b²)-[2(a²-1)+2b²-3] 化简下列式子
(4a²-3b²)-[2(a²-1)+2b²-3] 化简下列式子
(4a²-3b²)-[2(a²-1)+2b²-3]
=4a²-3b²-(2a²-2+2b²-3)
=4a²-3b²-(2a²+2b²-5)
=4a²-3b²-2a²-2b²+5
=(4a²-2a²)+(-3b²-2b²)+5
=2a²-5b²+5
(4a²-3b²)-[2(a²-1)+2b²-3]
=4a²-3b²-(2a²-2+2b-3)
=4a²-3b²-2a²-2b²+5
=2a²-5b²+5
原式=4a²-3b²-(2a²-2+2b²-3)
=4a²-3b²-2a²-2b²+5
=2a²-5b²+5