Question

Simplify: (√5-4√7)(√7+3√5)

Answer 1

$( \sqrt{5} - 4 \sqrt{7} )( \sqrt{7} + 3 \sqrt{5} ) \\ \sqrt{35} + 15 - 28 - 12 \sqrt{35} \\ - 13 - 11 \sqrt{35}$

I hope that helps you

Answer 2

Answer :-

$\sqrt5 -4 \sqrt{7}$

=-8.34

$\sqrt7 + 3 \sqrt{5} =$

=9.35

=-8.34×9.35

=-77.97 Answer