Question 155988
y=x^4-5x^2+4
{{{ graph( 300, 200, -6, 5, -10, 10, x^4 -5x^2 +4) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 
x^4 -5x^2 +4). 
X INTERCEPTS=-2,-1,1,2
Y INTERCEPT=4
YOU GET THE INTERCEPTS BY EXAMINING THE GRAPH.
YOU KNOW THE Y INTERCEPT=4 FROM THE EQUATION.
THE X ANSWERS ARE RIGHT ON THE GRAPH X LINE.