Question

m2-n2-o2+mno if m=-2,n=-1,o=3,then find​

Answer 1

Step-by-step explanation:

Given, m−n=16 and m2+n2=400

We know that, (m−n)2=m2+n2−2mn   ... (i)

By putting the given values in equation (i),

(16)2=400−2mn

256=400—2mn

256−400=−2mn

—144=−2mn

72=mn

So, the value of mn is 72