What is the difference between evaluation and simplification of an expression?

Question

What is the difference between evaluation and simplification of an expression?

Answer 1

Simplification puts an equation into its simplest form. Example:

3x^2 + 4x - 7x + 5 - x^2 = 2x^2 - 3x + 5

Simplified, but not evaluated.



Evaluation actually solves a problem. Example:

3x^2 + 4x - 7x + 5 - x^2 when x=4

3x^2 + 4x - 7x + 5 - x^2 = 2x^2 - 3x + 5 <== first we simplify

2(4^2) - 3*4 + 5 <== "plug and chug" as I like to call it

32 - 12 + 5 = 25 <== evaluate each expression and add

always remember order of operations: PEMDAS

Answer 2

Simplifying And Evaluating Expressions

Answer 3

Evaluation means to substitute specific values for some or all variables and simplify the result as much as possible. Simplification means to combine terms by arithmetic operations so as to reduce the total number of symbols present. Examples:

Simplfy 2x-3+4x+5, get 6x+2.

Evaluate the foregoing for x=3, get 20.

Answer 4

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Evaluating an algebraic expression means replacing the letters with given numbers and working out the resulting value. Example 2a + 3b - 5. Given a = 3, b = 1 you can evaluate this to 4. Simplifying an algebraic expression means leaving it as algebra but using prescribed mathematical rules to change it to an equivalent but less clumsy looking form. Example. 2(a - b) + 3(a + b) can be simplified to 5a + b.

Answer 5

To evaluate an expression is to ascertain the numerical value of it. Another word for :"evaluate" is "calculate".



To simplify an expression is to make it less complex or complicated so that it becomes easier to read or understand.

Answer 6

evaluation is finding the value of the expression given certain values/conditions

simplification means reducethe expressionto its simplest form

example

evaluate f(2) when f(x)=x^3

f(2)=2^3=8

simplify 3x^2+9x-6x+9x^2+15

=12x^2+3x+15

Answer 7

Its just to confuse you, they mean pratically the same thing - work this out. You should just look at the question and know what to do.