Question

determine as raízes das equações do 2° grau
a) ײ-10×=0
b)2y²-7y=0
c)4ײ-4×=0
d)2ײ-4×=0
E)5y²-3y=0

Answer 1

d)
2x² - 4x = 0
x(2x - 4) = 0
x = 0

2x - 4 = 0
2x = 4
x = 4/2
x = 2
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e)
5y² - 3y = 0
y(5y - 3) = 0
y = 0

5y - 3 = 0
5y = 3
y = 3/5
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a)
x² - 10x = 0
x(x - 10) = 0
x = 0

x - 10 = 0
x = 10
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b)
2y² - 7y = 0
y(2y - 7) = 0
y = 0

2y - 7 = 0
2y = 7
y = 7/2
__________________________________________
c)
4x² - 4x = 0
x(4x - 4) = 0
x = 0

ou
4x - 4 = 0
4x = 4
x = 4/4
x = 1