Question

Se x.y = 12 e x² + y2 = 20, calcule o valor de (x + y)2. *
4 pontos
8
O 44
O 32
O 400
O 144
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Answer 1

(x+ y)^2

= x^2 + 2xy + y^2

= x^2 + y^2 + 2xy

= 20 + 2 ( 12 )

= 20 + 24

= 44