Question 780657
What is the difference between simplifying an algebretic expression and evaluating an expression when we aren't supposed to solve the expression.
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We can "solve" equations.  That solving process may involve simplifying.
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We can only "simplify" algebraic expressions.  We cannot "solve" them.
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 Problem is 
4-5(2-1)+(3-4)^2
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This is an algebraic expression.  It is not an equation.
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= 4-5(1)+(-1)^2
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= 4-5+1
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= 0
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Cheers,
Stan H.