Question 1031874
y = x^2 - 5x - 4
y = -2x^2 - 4x - 2
Substitute (x^2 - 5x - 4) for y in the 2nd equation
x^2 - 5x - 4 = -2x^2 - 4x - 2 
Combine like terms on the left
x^2 + 2x^2 - 5x + 4x - 4 + 2 = 0
3x^2 - x - 2 = 0
you can use the quadratic formula but this will factor to
(3x + 2)(x - 1)
3x = -2  
x = -2/3
and
x = 1