Question

M square +2mn -24n square =

Answer 1

-13/2,
Step-by-step explanation:
(m + n) ^2 = m square + n square + 2mn
2 = 15 +2mn
-13 = 2mn
mn = -13/2
(m-n) square = m square + n square -2mn
(m- n) square = 15 - 2*-13/2
= 15 + 13
= 28
(m - n ) = root 28 = 2 root 7

Hope it helps you