Question

$\sqrt{ \frac{7}{2} * \frac{1}{2} -3*( \frac{-7}{2} )$

Answer 1

$\sqrt{ \frac{7}{2} *\frac{1}{2}-3*(- \frac{7}{2} ) } = \sqrt{ \frac{7}{2*2} +3* \frac{7}{2} } =\sqrt{ \frac{7}{4} +\frac{3*7}{2} } = \sqrt{ \frac{7}{4} +\frac{21}{2} } \\ \\ = \sqrt{ \frac{7}{4} +\frac{42}{4} }=\sqrt{ \frac{42+7}{4} }=\sqrt{ \frac{49}{4} }= \frac{ \sqrt{49} }{ \sqrt{4} } = \frac{7}{2} =3,5$