Question

{x=2-y} x²-y²=10 mim ajuda e para amanhã​

Answer 1

$x = 2 - y \\ {x}^{2} - {y}^{2} = 10 \\ {(2 - y)}^{2} - {y}^{2} = 10 \\ 4 - 4y + {y}^{2} - {y}^{2} = 10 \\ 4 - 4y = 10$

$4y = 4 - 10 \\ 4y = - 6 \\ y = - \frac{6}{4} \\ y = -\frac{3}{2}$

$x = 2 - y \\ x = 2 - (-\frac{3}{2} ) \\ x = \frac{7}{2}$

S={7/2, -3/2}