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Can you evaluate an expression? and if so, please explain how to. thank you. <3

User Dflorey
by
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1 Answer

4 votes

If an expression doesn't involve a variable, evaluating it simply means to simplify it, following PEMDAS rule. For example, if we start with


2+3\cdot 5+(3+7)\cdot 2

We perform parenthesis first:


2+3\cdot 5+10\cdot 2

Then multiplications:


2+15+20

And finally additions:


37

If, instead, an expression involves variables, evaluating the expression means to plug a specific value for the variable(s): for example, if we start with


f(x,y)=3x+2xy

If we choose x=4 and y=7 the expression becomes


f(4,7)=3\cdot 4+2\cdot 4\cdot 7=12+56=68

User Lukas Hajdu
by
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