utcpatrick
Answered

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If
(
m
−
n
)
2
=
1
and
m
2
+
n
2
=
13
, what is the value of
−
2
m
n
?


−
14

− − 14

−
12

− − 12

12

12

14

If M N 2 1 And M 2 N 2 13 What Is The Value Of 2 M N 14 14 12 12 12 12 14 class=

Sagot :

xenia168

Answer:

- 12

Step-by-step explanation:

(m - n)² = 1

m² + n² = 13

m² - 2mn + n² = 1

( m² + n² ) - 2mn = 1

13 - 2mn = 1

- 2mn = 1 - 13

- 2mn = - 12

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