Question

POR FAVOR GENTE RESPONDAM LOGO!

Se x + 5y = -28 e 2x + 3y = -7, dê o valor de x² + y ²

Answer 1

x+5y=-28
2x+3y=-7 x=-28-5y
x=23y

2×23y+3y=-7
46y+3y=-7
49y=-7
y=-7-49
y=-42 x+5(-42)=-28
x-210=-28
x=-28+210
x=182
42×42=1,764
182×182=33,124

1.764+33.124=34,888

resposta x²+ y ²=34.888