6x²-24=0
first step is to find the gcf here
gcf of 6 and 24 is 6, taking out the gcf
6(x²-4)=0
dividing both sides by 6
x²-4=0
we can write 4 as 2² here
x²-2²=0
(x+2)(x-2)=0
x=2 and x=-2
