Respostas

2013-12-09T20:08:44-02:00
(2x²-9x+2)+(3x²+7x-1)
2x²-9x+2+3x²+7x-1
5x²-2x+1
Δ= b²-4ac
Δ= (-2)² -4·5·1
Δ= 4-20
Δ= -16 ∉