Question

xy =12

x - y = 40

x²+y² = ?

Answer 1

Respuesta:

424

Explicación paso a paso: si 40 es 20

$\\ \times - y = 20 \\ ({x - y)}^{2} = 400 \\ {x}^{2} + {y}^{2} - 2xy = 400 \\ {x}^{2} + {y}^{2} - 2(12) = 400 \\ {x}^{2} + {y}^{2} = 400 + 24 \\ {x}^{2} + {y}^{2} = 424$