Question

2 root5 +5root7 =.........................​

Answer 1

Step-by-step explanation:

$\bf\ 2 \sqrt{5} + 5 \sqrt{7} \\ \\ \bf\ \implies: \sqrt{2} \times \sqrt{2} \times \sqrt{5} + \sqrt{5} \times \sqrt{5} \times \sqrt{7} \\ \\ \bf\ \implies: \sqrt{5} \bf\{ \sqrt{2} \times \sqrt{2} + \sqrt{5} \times \sqrt{7} \} \\ \\ \bf\ \implies: \sqrt{5} \bf\{ 4 \sqrt{35} \}$