Question

Determine o conjunto soluçao das seguintes equacoes

x2-4=0
6x2=5x
x2=64
x2-5x=0

Answer 1

$x^{2}-4x=0 x^{2}=4 x= +4 ou -4$

6x²=5x

6x²-5x=0

x(6x-5)=0

x=0

ou x=5/6

x²=64

x=+8 ou -8

x²-5x=0
x(x-5)=0
x=0 ou x=5

Answer 2

x2-4=0 ==> x2 = 4 ==. x = +/-2
======================================================
6x2=5x ==> 6x2 - 5x = 0 ==> x(6x-5) = 0

x1 = 0  

6x2 - 5 = 0 ==> 6x2 = 5 ==> x2 = 5/6
=====================================================
x2=64 ==> x = +/- v64 ==> x= +/- 8
=====================================================
x2-5x=0

x(x-5) = 0

x1 = 0  
 
x2 - 5 = 0 ==> x2 = 5 ==> x2 = 5