Answer:
22
Step-by-step explanation:
4x4+8-2
Using PEMDAS, assuming theres no parentheses.
First do 4x4 which is 16.
16+8-2
You are left with 22.
The formula to find the discriminant equals D = b^2-4ac.
(Quadratic equations have the formula ax^2+bx+c. A = -1, B = +4, C = -2.)
D = 4^2-4(-1)(-2). 8-8 = 0.
0 = 1 solution
-D = 0 solutions
+D = 2 solutions
The discriminant equals 0, also establishing that if you were asked to find the solutions, there would only be one.