Question

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Answer 1

\(1,\sqrt{121}=\pm11\\ 2,\sqrt{196}=13\\ 3,\\ a,=15+15-32=-2\\ b,=5\sqrt{5}+\sqrt{5}-12\sqrt{5}=-6\sqrt{5}\\ c,=\dfrac{3\left(\sqrt{13}+\sqrt{10}\right)}{13-10}=\sqrt{13}+\sqrt{10}\\ 4,\\ a,ĐK:x-1\ge0\Leftrightarrow x\ge1\\ b,ĐK:-2x+4\ge0\Leftrightarrow-2x\ge-4\Leftrightarrow x\le2\\ 5,\\ ĐK:x\ge-3\\ PT\Leftrightarrow x+3=4\Leftrightarrow x=1\left(tm\right)\)