Respostas

2014-05-13T01:30:54-03:00

x²+3x-6=-8

x²+3x-6+8=0

x²+3x+2=0

Δ= 3²-4 · 1 · 2

Δ= 9-8

Δ=1

×= (-3 +- 1)/ 2·1

×=(-3+1)/2 -> -2/2 -> -1

×= (-3-1)/2 -> -4/2 ->-2

x¹= -1

x² -2

s= (-1,-2)


1 5 1
2014-05-13T07:38:23-03:00