Can you see that each term has been multiplied by ?
That means that you can take out as a common factor.
Can you see that each term has in it? (note that and )
So we can take out as a common factor.
Can you see anything that goes into every term in this expression? I can't...
The best you could hope for in this case is to factorise groups of two...
We still don't get any common factors though...
This is a quadratic equation of the form .
We can factorise the quadratic by finding two numbers that multiply to be and add to be .
What numbers multiply to be and add to be ? Surely the two numbers must be and .
Watch what happens when I break up the middle term...
If we factorise by groups of two, we can find a common factor...
Can you see that is a common factor?
Now we have two "things" multiplying to become . This means at least one of those "things" had to be .
So or .
Can you tell me what has to be?