The slope would be -2 because you would use the equation m= y2-y1/x2-x1
If the value of x is -ve, then, there resultant value must be positive
10-(-x) = 10+x
X = 2 + (x-2)sqrt
<=> x - 2 = (x - 2)sqrt
<=> x-2 = 0 OR x - 2 = 1
=> x = 2 OR x = 3
The evaluate expression is 8