化简5乘以根号a-根号9a
问题描述：
化简5乘以根号a-根号9a
答
5√a-√9a
=5√a-√3²a
=5√a-3√a
=2√a
化简5乘以根号a-根号9a
5√a-√9a
=5√a-√3²a
=5√a-3√a
=2√a