Since multiplication is higher than addition in the order of operations you need to add such that you get
Hi andyboy179,
you need to know how to multiply out the terms of x(x-1)
You do it the exact same way as 3(3-1)=3(2)=6
3(3-1)=3(3)+3(-1)=9-3=6
Or 5(5-1)=5(4)=20
5(5-1)=5(5)+5(-1)=25-5=20
You just multiply the x by both terms inside the brackets
Now combine that with
Can you continue from there?