定义一种新的运算:a*b=a+b,化简 :(a^2)*(3ab)+5a^2b-4ab

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定义一种新的运算:a*b=a+b,化简 :(a^2)*(3ab)+5a^2b-4ab
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定义一种新的运算:a*b=a+b,化简 :(a^2)*(3ab)+5a^2b-4ab
定义一种新的运算:a*b=a+b,化简 :(a^2)*(3ab)+5a^2b-4ab

定义一种新的运算:a*b=a+b,化简 :(a^2)*(3ab)+5a^2b-4ab
因为a*b=a+b
所以:(a²)*(3ab)=a²+3ab
(a²)*(3ab)+5a²b-4ab
=a²+3ab+5a²b-4ab
=a²-ab+5a²b