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AnnaJulia2704
@AnnaJulia2704
December 2019
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A equação x² - 3 x = - 2
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rodrigoreichert
Verified answer
X² - 3x = -2
x² - 3x + 2 = 0
a = 1
b = -3
c = 2
Δ = b² - 4ac = (-3)² - 4 * 1 * 2 = 9 - 8 = 1
x' = (-b + √Δ) / 2a = (-(-3) + √1) / (2 * 1) = (3 + 1) / 2 = 4 / 2 = 2
x'' = (-b - √Δ) / 2a = (-(-3) - √1) / (2 * 1) = (3 - 1) / 2 = 2 / 2 = 1
Portanto, x=1 ou x=2.
1 votes
Thanks 0
belinha98
X^2 -3x= -2
x^2 -3x +2=0
Delta = b^2 -4.a.c
Delta = (-3)^2 -4. 1. 2
Delta = 9 - 8
Delta = 1
X = -b +- (raiz de delta) / 2.a
X = - (-3) +- (raiz de 1)/ 2.1
X = 3 +- 1 /2
x' = 3+1/2
x' = 4/2
x' = 2
x" = 3-1/2
x" = 2/2
x" = 1
1 votes
Thanks 1
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Verified answer
X² - 3x = -2x² - 3x + 2 = 0
a = 1
b = -3
c = 2
Δ = b² - 4ac = (-3)² - 4 * 1 * 2 = 9 - 8 = 1
x' = (-b + √Δ) / 2a = (-(-3) + √1) / (2 * 1) = (3 + 1) / 2 = 4 / 2 = 2
x'' = (-b - √Δ) / 2a = (-(-3) - √1) / (2 * 1) = (3 - 1) / 2 = 2 / 2 = 1
Portanto, x=1 ou x=2.
x^2 -3x +2=0
Delta = b^2 -4.a.c
Delta = (-3)^2 -4. 1. 2
Delta = 9 - 8
Delta = 1
X = -b +- (raiz de delta) / 2.a
X = - (-3) +- (raiz de 1)/ 2.1
X = 3 +- 1 /2
x' = 3+1/2
x' = 4/2
x' = 2
x" = 3-1/2
x" = 2/2
x" = 1