Tips for Beginners for the TI 89 Calculator

Error: Dimension. Error: Dimension means that the variable you are using, e.g. x, is not the correct dimension for the function you are using, e.g. Factor(x^2 - 9). This is probably because by accident you stored something in x. Either use F4 Other 4:DelVar x or F6 Clean Up 1: Clear a-z. Reset All Memory. To reset all memory key: 2nd, 6, F1, 3 ... ................
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