规定a*b=4a+3b,求2*3:;3*(1*5)怎么算
问题描述：
规定a*b=4a+3b,求2*3:;3*(1*5)怎么算
答
2*3=4×2+3×3
=8+9
=17
3*(1*5)=3*(4×1+3×5)
=3*19
=4×3+3×19
=12+57
=69