Respostas

2013-06-27T08:39:10-03:00

2(-x)² + 3(-x) = 0
2(x²) - 3x = 0
2x² - 3x = 0
x (2x - 3) = 0
x = 0 
2x - 3 = 0 
2x = 3
x = 3/2
R: x = 0 e x = 3/2

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2013-06-27T08:47:31-03:00

2(-x)²+3(-x)=0

2x²-3x=0

x(2x-3)=0

2x=3

x=3/2

 

x=0

x=3/2

essas sao as respostas espero ter ajudado

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