noor261259
noor261259 noor261259
  • 09-01-2021
  • Mathematics
contestada

If mn = 16 and m2 + n2 = 68. then
(m + n) 2 equals​

Respuesta :

salunkheharsh81 salunkheharsh81
  • 09-01-2021

Answer:

So, the value of mn is 72.

Step-by-step explanation:

Given, m−n=16 and m  

2

+n  

2

=400

We know that, (m−n)  

2

=m  

2

+n  

2

−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.

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