B=\(\sqrt{8x-4}\)+\(\sqrt{18x-9}\)+\(\sqrt{50x-25}\)
=\(\sqrt{4\left(2x-1\right)}\)+\(\sqrt{9\left(2x-1\right)}\)+\(\sqrt{25\left(2x-1\right)}\)
=\(\sqrt{4}\)\(\sqrt{2x-1}\)+\(\sqrt{9}\)\(\sqrt{2x-1}\)+\(\sqrt{25}\)\(\sqrt{2x-1}\)
=\(\sqrt{2x-1}\)(\(\sqrt{4}\)+\(\sqrt{9}\)+\(\sqrt{25}\))
=\(\sqrt{2x-1}\)(2+3+4)
=9\(\sqrt{2x-1}\)
\(B=\sqrt{8x-4}+\sqrt{18x-9}+\sqrt{50x-25}\)
\(=2\sqrt{2x-1}+3\sqrt{2x-1}+5\sqrt{2x-1}\)
\(=10\sqrt{2x-1}\)