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Nuelly1
@Nuelly1
December 2019
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Alguem me ajuda pfv.. 32)determine a raiz das equaçoes utilizando a forma resolutiva.(formula de Baskara). a)2x*+x-1=0. b)2x*+2-24=0
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rosanev
a)2x² + x - 1=0
x = [-1 +- √1² - 4.2.(-1)]/2.2
x = [-1 +- √1 + 8]/4
x = [-1 +- √9]/4
x' = (-1+3)/4 = 2/4 = 1/2
x" = (-1-3)/4 = -4/4 = -1
b) 2x² + 2x - 24=0
x = [-2 +- √2² - 4.2.(-24)]/2.2
x = [-2 +- √4 + 192]/4
x = [-2 +- √196]/4
x' = (-2 + 14)/4 = 12/4 = 3
x" = (-2 - 14)/4 = -16/4 = -4
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Nuelly1
,vlw pela ajuda♥
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x = [-1 +- √1² - 4.2.(-1)]/2.2
x = [-1 +- √1 + 8]/4
x = [-1 +- √9]/4
x' = (-1+3)/4 = 2/4 = 1/2
x" = (-1-3)/4 = -4/4 = -1
b) 2x² + 2x - 24=0
x = [-2 +- √2² - 4.2.(-24)]/2.2
x = [-2 +- √4 + 192]/4
x = [-2 +- √196]/4
x' = (-2 + 14)/4 = 12/4 = 3
x" = (-2 - 14)/4 = -16/4 = -4