SOLUTION: Is the following expression true or false? Explain your answer. If r = 9 and s = -4, then r² - 2s = 73. Thank you!!

Algebra ->  Algebra  -> Expressions-with-variables -> SOLUTION: Is the following expression true or false? Explain your answer. If r = 9 and s = -4, then r² - 2s = 73. Thank you!!      Log On

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Question 106530: Is the following expression true or false? Explain your answer.
If r = 9 and s = -4, then r² - 2s = 73.

Thank you!!
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
If r = 9 and s = -4, then r² - 2s = 73.
Plug the values:
r² - 2s = 73
(9)² - 2(-4) = 73
81 + 8 = 73 False