√98-3,5√8-42√2/441 ПОМОГИТЕ РЕШИТЬ

[latex] \sqrt{98} = \sqrt{49}* \sqrt{2} =7 \sqrt{2} [/latex] [latex] \sqrt{8} = \sqrt{4} * \sqrt{2} =2 \sqrt{2} [/latex] [latex] \sqrt{ \frac{2}{441} } = \sqrt{2} * \sqrt{ \frac{1}{441} } = \frac{1}{21} \sqrt{2} [/latex] [latex]=7 \sqrt{2}-7 \sqrt{2} - 2\sqrt{2} =-2 \sqrt{2} [/latex]