Question

simplify √63-5√28+11√7

Answer 1

=7.93-5*5.29+11*2.64
=7.39-26.45+29.04
= -26.45+36.43
= 9.98
 

Answer 2

$\sqrt{63} - 5 \sqrt{28} + 11 \sqrt{7} \\ = 3 \sqrt{7} - 10 \sqrt{7} + 11 \sqrt{7} \\ = 4 \sqrt{7}$