Question

Factorise completely 2y^2-4y

Answer 1

To factor an expression, first you have to find the GCF or Greatest Common Factor of all of the pieces of the expression.

The GCF of 2y^2 and -4y is 2y

So, to factor this expression, we need to divide all of the pieces of the expression by the GCF.

2y(y-2)

2y^2 - 4y in completely factored form is 2y(y-2)

Answer 2

You find the gcf which is 2y
you factor it out: 2y(y-2)