Question 105195
MAYBE GRAPHING THESE 2 EQUATIONS WOULD HELP:
Y=-2X^2-2X (RED CURVE)
Y=X^2-1 (GREEN CURVE)
{{{ graph( 300, 200, -6, 5, -10, 10, y = -2x^2 -2x, y = x^2 -1) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -2x^2 -2x and y = x^2 -1). 
first equation:
x-----y
0-----0
1---(-4)
(-1)--0
3---(-24)
second equation
x-----y
0----(-1)
1-----0
(-1)--0
3-----8