Question

if m²+n² = 8. mn=4. find m+n​

Answer 1

Answer:

mn is equal to 4 when divided by 2 we get 2 then 2×2 +2×2 -8

Answer 2

Answer:

m+n = ±4

Step-by-step explanation:

m^2 + n^2 = 8

mn = 4

=> 2mn = 8

And we know that:

(m+n)^2 = (m^2 + n^2) + (2mn)

(m+n)^2 = 8 + 8

(m+n)^2 = 16

m+n = ±4.

And that's how you do it!

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