... this on a graph, you need it's roots, or where the graph crosses the x axis (x intercepts). In order to find the roots of this function, you use the quadratic formula. x=-b b - 4ac. (y=ax + bx + c) 2a This is how the function y = x + 4x - 3 would break down: Step 1 x= -4 4 - 4(1)(-3) Step 2 x= -4 38 2a 2a Step 3 X= -4 6.16 Step 4 x = 1.08 2a x = -5.08 (origins) If you want to be able to graph ... ...

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