Sistema:
2x-y+5=0
x²+y-a=0
Resposta do gabarito: 4
2x - y + 5 = 0
y = 2x + 5
x² + 2x + 5 - a = 0
delta
d² = 4 - 20 + 4a
-16 + 4a = 0
4a = 16
a = 16/4 = 4
pronto
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Verified answer
2x - y + 5 = 0
y = 2x + 5
x² + 2x + 5 - a = 0
delta
d² = 4 - 20 + 4a
-16 + 4a = 0
4a = 16
a = 16/4 = 4
pronto