Answer:
2, and 10
Step-by-step explanation:
Let's work through each one.
First, plug -10 into the equation:
-10² + 20 = 12 x -10?
-10² = 100
100 + 20 = 120
12 x -10 = -120
120 = -120? False!
But, using these same calculations, we can see that 10 is a correct answer.
Because everything's the same up to 12 x 10 = 120.
120 = 120
Same with 2 and -2
-2 does not work, but 2 does.
2² + 20 = 12 x 2?
4 + 20 = 24?
24 = 24? True!
