Algebra Calculator online

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Algebra is an important section in math which involves finding the value of any given algebraic expression using various numerical operations like addition, subtraction, multiplication or division. Algebra online calculator is the tool which can evaluate an algebraic expression to find its values.


Example 1: Find the value of the given algebraic expression, 2x2 – 3x+ 9 when the ‘x’ value is 4

Given algebraic expression: 2x2 – 3x+ 9

And given x = 4  Substituting ‘x’ as ‘4’ in the above given expression, we get

2(4)2 – 3(4) + 9

2(16) – 12 + 9

32 – 12 + 9

20 + 9 = 29

Hence the value of the given expression when x = 4 is, 29.



Example 2: Given the algebraic expression, 4x + 6y – 3z = 14 when x = 2, and y=3. Find the value of ‘z’.

Given algebraic expression 4x + 6y – 3z = 14

Since x = 2 and y = 3, hence substitute them in the above equation!

4(2) + 6(3) – 3z = 14

8+18–3z=14

26–3z=14

Solving for ‘z’, subtract ‘26’ on both sides

-3z =14–26  -3z = -12

Dividing ‘-3’ on both sides of the equation

z = -12/-3 z = 4


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