Question

resolva a equação ; x²+3=4x

Answer 1

x² +3 = 4x
x² - 4x + 3 = 0
Δ = (-4)² - 4 * 1 * 3
Δ = 16 - 12
Δ = 4
x = -(-4) +- √4 / 2a
x1 = 4 + 2 / 2  x1 = 6 / 2   x1 = 3
x2 = 4 - 2 / 2   x2 = 2 / 2   x2 = 1
S={3, 1}

Answer 2

x² + 3 = 4x

x² - 4x + 3 = 0


delta = b² - 4.a.b

a = 1
b = -4
c = 3


delta = (-4)² - 4.1.3
delta = 16 - 12
delta = 4


x = -b ± √delta/2.a


x = -(-4) ± √4/2.1

x = 4 ± 2/2

x = 4 + 2/2 = 6/2 = 3

x = 4 - 2/2 = 2/2 = 1


s={ 3, 1 }



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