Question

m² + n ² sabendo que m*n = -3 e (m+n)² = 4

Answer 1

m² + n² = 3

mn = - 3

( m + n)²  = 4

[ (m)² + 2 * m * n  + (n)² ]  = 4²

m² + 2mn + n²  = 16

( m² + n²) + 2mn  = 16

( m² + n²  + 2 ( -3)  = 16

m² + n² - 6  = 16

m² + n² = 16 + 6

m² + n² = 22 ***** resposta