SAT Math: Plugging in Zeroes and Cross-Multiplying to Find an Unknown Variable

In the system of equations shown above, if one of the zeros of the quadratic equation is at x = -2, and c and d are constants, what is the x-value of the other zero?

Passport to Advanced MathRadical and rational equations in one variable
Product TypeSAT Math
SATSAT Math
SAT MathAlgebra and Functions
Passport to Advanced Math
Test PrepSAT Math