Question

Qual as raizes das equações incompletas :
1- x²-5x=0
2- x²+7x=0
3- x²=10x

Answer 1

1)
x²- 5x = 0
x.(x - 5) = 0
x = 0

x - 5 = 0
x = 5

R.: x = 0 e x = 5
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2)
x² + 7x = 0
x.(x + 7) = 0
x = 0

x + 7 = 0
x = - 7

R.: x = 0 e x = - 7
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3)
x² = 10x
x² - 10x = 0
x.(x - 10) = 0
x = 0

x - 10 = 0
x = 10

R.: x = 0 e x = 10