SOLUTION: What is the difference between an equation and an expression?

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Question 144105: What is the difference between an equation and an expression?
Answer by nabla(475) About Me  (Show Source):
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An equation is a statement saying two things are equal.
An expression is a combination of mathematical terms without an equal sign (in general).
Examples:
equation: x^2+2x+1=0
expression: x^2+2x+1 or (x+1)^2