5(x—2)—3(2x—1);(5m^3—2m^2)—(—3m^2+2m^3);5x+(–2x)-[3(x–1)–4(2x+1)]化简
问题描述:
5(x—2)—3(2x—1);(5m^3—2m^2)—(—3m^2+2m^3);
5x+(–2x)-[3(x–1)–4(2x+1)]化简
答
1,-x-7,2,3m^3+m^2 ,3,8x+7
答
原式=5x-10-6x+3
=-x-7
原式=5m³-2m²+3m²-2m³
=3m³+m²
原式=5x-2x-(3x-3-8x-4)
=3x-(-5x-7)
=3x+5x+7
=8x+7