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Algebra

Chapter 18

Problem 4

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Using the values a = , b = , and c = prove the distributive law,

that is, a(b + c) =

and ab + ac = are equal.
or a(b + c) = ab + ac .


Example:

Evaluate: f = (x - y) + (-x)2 given: x = -2 and y = 6
Solution: Substituting gives f = (x - y) + (-x)2 = (-2 - 6) + (2)2 = -8 + 4
or: f = -4

A second way to solve this graphically is to enter (-2-6)+2^2 in the box
to the right of Function f(x) = below. Then click on the Plot Graph button
The answer will appear to the right as f(x)=-4 which is below your Function f(x)= box