Question

Answer 1

Bài 1:

\(a,=2\sqrt{2}-9\sqrt{2}+16\sqrt{2}-10\sqrt{2}=-\sqrt{2}\\ b,=\sqrt{\left(\sqrt{3}+\sqrt{2}\right)^2}-\left|\sqrt{2}-\sqrt{3}\right|=\sqrt{3}+\sqrt{2}-\sqrt{3}+\sqrt{2}=2\sqrt{2}\\ c,=\left(\cos^255^0+\sin^255^0\right)-\left(\tan32^0-\tan32^0\right)+\dfrac{\tan27^0}{\tan27^0}=1-0+1=2\)

Bài 2:

\(a,ĐK:x\ge7\\ PT\Leftrightarrow\sqrt{x-7}=\dfrac{15}{3}=5\Leftrightarrow x-7=25\Leftrightarrow x=32\left(tm\right)\\ b,ĐK:x\ge-5\\ PT\Leftrightarrow2\sqrt{x+5}-2\sqrt{x+5}+3\sqrt{x+5}=12\\ \Leftrightarrow\sqrt{x+5}=4\\ \Leftrightarrow x+5=16\\ \Leftrightarrow x=11\left(tm\right)\)