Question

Determine as raízes reais das equações incompletas.

a) x² - 25 = 0
b) x² - 2x = 0
c) 2x² -200 = 0
d) 4x² - 16 = 0

Answer 1

a) x2=25
x=√25
x=5
b)x(x-2)=0
x-2=0
x=2
c)2x2=200
x2=200
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2
x2=100
x=√100
x=10
d)4x2=16
x2=16
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4
x=√4
x=2