Question

resolva as equacoes em R
A) (x-2) (x-3)=0
B) (x-3) (x-2)=0
C) (n²-7n=0
D) 2y²-8y=0

Answer 1

(x - 2).(x - 3) = 0
x - 2 = 0
x = 2

x - 3 = 0
x = 3

R.: x = 3 e x = 2
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b)
(x - 3).(x - 2) = 0
x - 3 = 0
x = 3

x - 2 = 0
x = 2

R.: x = 3 e x = 2
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c)

n² - 7n = 0
n(n - 7) = 0
n = 0

n - 7 = 0
n = 7

R.: n = 0 e n = 7
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d)

2y² - 8y = 0
y(2y - 8) = 0
y = 0
2y - 8 = 0
2y = 8
y = 8/2
y = 4

R.: y = 0 e y = 4