Объяснение:
1. 5аb^3-3ab^3+4ab^3=ab(5-3+4)=6ab^3
2. а)(6х-0,7)-0,4(3х+5)=6x-0,7-1,2x-2=-4,8x-2,7
б)7а^8×(-0,3а^5)^2=7a^8×(-0,3a^10)=a^8(7×(-0,3a^2)
3. -2×3^2+4×5^3=
1)-2×3^2=-2×9=-18
2)4×5^3=4×125=500
3)500+(-18)=482
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Answers & Comments
Объяснение:
1. 5аb^3-3ab^3+4ab^3=ab(5-3+4)=6ab^3
2. а)(6х-0,7)-0,4(3х+5)=6x-0,7-1,2x-2=-4,8x-2,7
б)7а^8×(-0,3а^5)^2=7a^8×(-0,3a^10)=a^8(7×(-0,3a^2)
3. -2×3^2+4×5^3=
1)-2×3^2=-2×9=-18
2)4×5^3=4×125=500
3)500+(-18)=482