Question

what is this answer .please

Answer 1

$\sqrt{95}$
is the answer

Answer 2

Howdy !!

your answer is --

by Pythagoras theorem

${12}^{2} = {7}^{2} + {b}^{2} \\ = > {b}^{2} = 144 - 49 \\ = > {b }^{2} = 95 \\ = > b = \sqrt{95}$

hope it help you