6x^2 - 14x = 0, Using factoring method.

Take out the highest common factor.

The highest common factor between 6 (which 2*3) and 14 (which 2*7) is 2

The highest common factor between x^2 (which is x * x) and x (which is x) is x.

2x (3x - 7) = 0

Now either 2x = 0 in which case x = 0

or

3x - 7 = 0

3x = 7

x = 7/3

The graph below shows you the answers to where 6x^2 - 14x cuts the x axis is below.