The highest common factor of both terms is 4x, so take this out by dividing each term by 4x
8x^2 / 4x = 2x
12x / 4x = 3
So the factored form is:
4x(2x+3)
Remember that

So if
and
, then we know
.
Then use the Pythagorean identity to solve for cosine:

Is there a picture with it?
2 minutes = 1.20 dollars for price of sundae.in 4 hours how many minutes are there?=> 60 * 4 hours = 240 minutes => 240 / 2minutes per sundae = 120 minutes => 120 * 1.20 = 144 dollars in 4 hoursOr 72 dollars in 2 hours