(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4
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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) (6)(6m²-4m-3)+(2m²-4m+1)
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
(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
(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4
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