Question

Khai phương 1 tích nha

Answer 1

\(\sqrt{80.125a^2}=\sqrt{10000a^2}=100\left|a\right|\)\(=\left[{}\begin{matrix}100a\left(a\ge0\right)\\-100a\left(a< 0\right)\end{matrix}\right.\)

 

Answer 2

\(\sqrt{80\cdot125\cdot a^2}\)

\(=4\sqrt{5}\cdot5\sqrt{5}\cdot\left|a\right|\)

\(=100\left|a\right|\)

Answer 3

\(\sqrt{80\cdot125a^2}\)

= \(\sqrt{1000a^2}\)

= \(\sqrt{1000}.\sqrt{a^2}\)

= \(100a\)

Answer 4

\(\sqrt{16.625.a^2}=4.25.\left|a\right|=100\left|a\right|\)

Answer 5

=\(\sqrt80 . \sqrt125a^2\)

=\(4\sqrt5 . 5\sqrt5 . a\)

=100a