Question

1- Resolva as equações do 2° grau. A) 5X²+25X=0. B) 4X²+X=0. C) 6X²=36X

Answer 1

A) 5x² + 25x = 0


x (5x + 25) = 0
x = 0

5x + 25 = 0
5x = -25
x = -25/5
x = -5

s={ 0, -5 }
.
.
.
B) 4x² + x = 0

x (4x + 1) = 0
x = 0

4x + 1 = 0
4x = -1
x = -1/4

s={ 0, -1/4 }
.
.
.
C) 6x² = 36x

6x² - 36x = 0

x ( 6x - 36) = 0
x = 0

6x - 36 = 0
6x = 36
x = 36/6
x = 6

s={ 0, 6 }




☆Espero ter ajudado! tmj