# Free SAT Practice Questions

Question 1 of 1
ID: SAT-PTAM-2
Section: Math - Passport to Advanced Math
If $a$ and $b$ are non-zero integers such that $a^2+b^2-4a-2b=0$ and $a^2-b^2=0$, which of the following could be the value of $\left(a-b\right)$? (without calculator)
A$-3$
B$2$
C$3$
D$6$