Texas Instruments TI-84 Plus CE Getting Started page 57

- E2 =0 ( expression 1 = expression 2 ) is finding the difference of the left hand side of
E1
your equation, E1 with X=
The difference is zero. The equation balances. X=
= E2 is not zero, but is a small value, the calculator algorithm likely gave a result
E1
close to the exact answer but within some tolerance of the calculator arithmetic.)
52 Solving Equations
-
2 and the right hand side of your equation, E2 with X=
-
2 is the solution. (Advanced: When
-
2.