How do I get a 650 on the Math 2 SAT?

For college placement, I need to get a 650 on the Math 2 SAT. How do I do this? I took a Barrons Practice Test and got a 610 and a Princeton Review Practice Test and got a 650. My scores are low due to the fact that my school is set up in a way that requires seniors to take Pre-Calc as the highest level math class, so I haven’t learned a bit of the material on the Math 2 test yet. I’m taking it in May (and if necessary June). How should I best prepare over these next 2 months with both the Barrons and PR test books to ensure a 650?

if u got 610 on barron’s u sholuld have a fair shot at getting 650+ on the real test. The barron’s practice tests are much harder.