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Algebra

Chapter 12

Problem 4

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The sum of and - is .


Example:

The sum or difference of any two numbers takes on the sign
of the larger number.
(1) f = 5 + 2 = 7.(larger number sign is +)
(2) f = 5 - 2 = 3.(larger number sign is +)
(3) f = 2 - 5 = -3. (larger number sign is -)
(4) f = -2 -5 = -7. (larger number sign is -)

To use the grapher calculator for case (3), enter 2 - 5 into
the Function f(x) = box. Then click on the Plot Graph button.
The answer will appear as -3 below the Function f(x)=box.