Answer:
You use substitution
Explanation:
Because you can see that y= both of those answers, you can set them equal to each other, creating the equation 2=x^2-3x-8
You then can use quadratics to solve the equation as follows:
-2 from both sides, 0=x^2-3x-10
Factors of -10 that add up to -3 are -5 and 2 leaving
0=(x-5)(x+2)
The 0 product property tells us that the answer is 5 and -2