SOLUTION: Tell weather the given expressions are always, sometimes, or never equal. Explain your reasoning and include examples.
#33
x + 4; x - 4
Algebra ->
Expressions-with-variables
-> SOLUTION: Tell weather the given expressions are always, sometimes, or never equal. Explain your reasoning and include examples.
#33
x + 4; x - 4
Log On
Question 213901: Tell weather the given expressions are always, sometimes, or never equal. Explain your reasoning and include examples.
#33
x + 4; x - 4 Answer by solver91311(24713) (Show Source):
This absurd result proves that the opposite case of your initial assumption is false, therefore and are NEVER equal. Another way to look at it is to say if and are equal, then for every real number , , but since , there is no value of for which and are equal.
You should be able to come up with your own examples. Picking a few numbers to substitute is all you have to do.
