Question

Resolva as equações incompletas do 2 grau (c=0):

A- x²-2x=0
B- x²+5x=0
C- 3x²-x=0
D- 2x²+x=0

Answer 1

A) x² - 2x = 0

x (x - 2) = 0
x = 0

x - 2 = 0
x = 2

S={ 0, 2 }
.
.
.
B) x² + 5x = 0

x (x + 5) = 0
x = 0

x + 5 = 0
x = -5

S={ 0, -5 }
.
.
.
C) 3x² - x = 0

x (3x - 1) = 0
x = 0

3x - 1 = 0
3x = 1
x = 1/3

S={ 0, 1/3 }
.
.
.
D) 2x² + x = 0

x (2x + 1) = 0
x = 0

2x + 1 = 0
2x = -1
x = -1/2

S={ 0, -1/2 }






☆Espero ter ajudado! tmj