Question

Calcule o valor da expressão (3v7 + v2) x (v7 + 3v2) 

Answer 1

$(3 \sqrt{7} + \sqrt{2} )( \sqrt{7}+3 \sqrt{2} )\\3 \sqrt{49} +9 \sqrt{14} + \sqrt{14} +3 \sqrt{4}\\3.7+9 \sqrt{14} + \sqrt{14} +3.2\\21+9 \sqrt{14} + \sqrt{14} +6\\27+10 \sqrt{14}$