Factor the expression 3x^2 - 6x
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3x ( x - 2 )

Step-by-step explanation:

Factorise the expression 3x² - 6x

When factorising, you aim is to 'simplify' the expression by taking out a common factor. A common factor is a term, coefficient or integer which occurs in both the terms in the expression

We want to factorise the expression 3x² - 6x

We can see that 3 could be a common factor as well as x

So

We factor out 3x out of 3x²  and - 6x

3x ( x - 2 )

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225