(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4x²y-5xy²)-(3xy²-4xy²) (3) 5a²-[ a²+(5a²-2a)-2(a²-3a)] (4) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³) (5) (4a²b-3ab)+(-5a²b+2ab) (
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![(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4x²y-5xy²)-(3xy²-4xy²) (3) 5a²-[ a²+(5a²-2a)-2(a²-3a)] (4) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³) (5) (4a²b-3ab)+(-5a²b+2ab) (](/uploads/image/z/1725389-53-9.jpg?t=%281%29%EF%BC%884a%26%23178%3Bb-10b%26%23179%3B%EF%BC%89%2B%EF%BC%88-3a%26%23178%3Bb%26%23178%3B%2B10b%26%23179%3B%29+%282%29+%284x%26%23178%3By-5xy%26%23178%3B%29-%283xy%26%23178%3B-4xy%26%23178%3B%29+%283%29+5a%26%23178%3B-%5B+a%26%23178%3B%2B%EF%BC%885a%26%23178%3B-2a%29-2%28a%26%23178%3B-3a%29%5D+%284%29+15%2B3%281-a%29-%281-a-a%26%23178%3B%29%2B%281-a%2Ba%26%23178%3B-a%26%23179%3B%29+%285%29+%284a%26%23178%3Bb-3ab%29%2B%28-5a%26%23178%3Bb%2B2ab%29+%28)
(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4x²y-5xy²)-(3xy²-4xy²) (3) 5a²-[ a²+(5a²-2a)-2(a²-3a)] (4) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³) (5) (4a²b-3ab)+(-5a²b+2ab) (
(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4x²y-5xy²)-(3xy²-4xy²) (3) 5a²-[ a²+(5a²-2a)-2(a²-3a)] (4) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³) (5) (4a²b-3ab)+(-5a²b+2ab) (6)(6m²-4m-3)+(2m²-4m+1)
(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4x²y-5xy²)-(3xy²-4xy²) (3) 5a²-[ a²+(5a²-2a)-2(a²-3a)] (4) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³) (5) (4a²b-3ab)+(-5a²b+2ab) (
1)(4a²b-10b³)+(-3a²b²+10b³) =4a²b-3a²b²+10b³-10b³=a²b².
(2) (4x²y-5xy²)-(3xy²-4xy²) =4x²y-5xy²-3xy²+4xy²=4x²y-4xy²=4xy(x-y).
3) 5a²-[ a²+(5a²-2a)-2(a²-3a)] =5a²-[ a²+5a²-2a-2a²+3a] = 5a²-[ 4a²+a] = 5a²-4a²-a=a²-a.
4)15+3(1-a)-(1-a-a²)+(1-a+a²-a³)=15+3-3a-1+a+a²+1-a+a²-a³=18-3a+2a²-a³.
(5) (4a²b-3ab)+(-5a²b+2ab)=4a²b-3ab-5a²b+2ab=-a²b-ab
(6)(6m²-4m-3)+(2m²-4m+1) =6m²-4m-3+2m²-4m+1=8m²-8m-2
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(1)原式=4a²b-10b³-3a²b²+10b³
=4a²b-3a²b²
(2) 原式=4x²y-5xy²-3xy²+4xy²
=4x²y- 4xy²