Casio fx-CG50 - Page 6

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Input the value 5 and press the l key to execute.
Taking it further – checking your algebra with True/False
You can check work by testing True/False for two expressions you hope are equivalent.
Check work on algebraic fractions (simplifying, adding, writing as partial fractions, changing improper to
mixed). For example, to check whether
2
2
1
43
x
xx
−
++
simplifies to
1
3
x
x
−
+
, input
2
2
11
4 3 3
xx
x x x
−−
=
+ + +
using the f key for x and L -. for the equals sign.
Press l and the calculator will give 0 if false and 1 for true for the current value of x.
Hint: BEFORE USING THIS, make sure that you define x as an appropriate value. For example, if x is set to
equal 0, it will tell you that
23xx=
is TRUE (clearly not true for all real values of x)!
To set the value for x that is useful for the identity or equation that you are checking, type the value you
want to use for x, then press b, f, l. This will assign that value to x.
Taking it further – explore the other menus in OPTN
Press d to go back through the menus to the top or to make other choices on menus that you have
already seen. It’s worth taking some time to familiarise yourself with them so that you are not searching
when using the calculator in earnest!