Calculator Check for Equivalence of Simplified Expressions Technology 6.1 Calculator Check for Equivalence of Simplified Expressions For Figure 6.1a, Figure 6.1a Enter the original expression, in Y1. ( ( 3  5 ) X,T,,n MATH 3 ) x2 Enter the simplified expression, in Y2. ( 9  2 5 ) X,T,,n  6 1 of 3

Calculator Check for Equivalence of Simplified Expressions Technology 6.1 Calculator Check for Equivalence of Simplified Expressions Numeric Check For Figure 6.1b, Figure 6.1b To check the equivalence numerically, view the table of values of Y1, the original expression, and Y2, the simplified expression with whole-number values for x. 2nd TBLSET ENTER 1 ENTER ENTER ▼ ENTER 2nd TABLE Check the values for Y1, the original expression, and Y2, the simplified expression. If the simplification was correct, corresponding values should be equal. (Note that we could have looked at a table of values for other x-values.) 2 of 3

Calculator Check for Equivalence of Simplified Expressions Technology 6.1 Graphic Check For Figure 6.1c, (-10, 10, -10, 10) Figure 6.1c To check the equivalence graphically, view the graphs of Y1, the original expression, and Y2, the simplified expression. ZOOM 6 The graphs should coincide. Check by using the trace feature of the calculator or by setting the graph of Y2 to be drawn with a bubble. 3 of 3