Question

Answer 1

\(VD1:\\ a,ĐK:2x-1\ge0\Leftrightarrow x\ge\dfrac{1}{2}\\ b,ĐK:x\ge0;x\ne49\\ VD2:\\ a,=3\sqrt{5}-2\sqrt{5}=\sqrt{5}\\ b,=-2+2=0\)