E. F5 - Math

2:ZeroFinds the x-intercept in a designated interval. This is very useful when solving equations.Example: Find a root of the equation . When you enter the left and right bounds, try to enter values that are relatively close to the zero so that other variations in the graph do not impede the process. Make sure that the bounds are on opposite "sides" of the zero. You can enter the bound directly or you can use the cursor to scroll to a value.

Press to

access the Y=Editor. Press and

set the window shown. Press to

draw the graph. Press and select

option 2:Zero. Enter -2 as the

lower bound. Enter -1 as the upper

bound. The zero is shown

below. Find the other zero

using the same process.Notice that the zero is given as x=-1.732051 and the y-value is given as y=4.E-13 which is the scientific form for y=0.0000000000004. This is essentially zero.