given that a+b=7 and ab=12,find the value of 2a(square)b+2ab(square)
问题描述:
given that a+b=7 and ab=12,find the value of 2a(square)b+2ab(square)
答
2a(square)b+2ab(square)=2ab(a+b)=2*12*7=168
或者a=3 b=4 或a=4 b=3都能快速算出来