【化简】,大侠们【1】2a+2[a+1]-3[a- - 知识问答

【化简】,大侠们【1】2a+2[a+1]-3[a-1] 【2】-3【2x^2-xy]+4[x^2+xy-6]

2个回答

【1】2a+2[a+1]-3[a-1]
=2a+2a+2-3a+3
=a+5
【2】-3【2x^2-xy]+4[x^2+xy-6]
=-6x²+3xy+4x²+4xy-24
=-2x²+7xy-24

相关问题