initial reaction is to set x=0 since the X intercepts are the values where X=0, since there's an exponent i think it gives you +40 and - 40. second reaction is to use a graphing calculator, plug in equation and look at table or graph.
Find the x-intercepts for y=3x^2+19x-40 The equation of the x axis is y = 0 So plug this into the formula You can do it the way Jim Beam said to get an approximation or you can just use the quadratic formula to get the exact answers.
