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Algebra expression calculator - Online Calculator - Tutorpace

# Algebra expression calculator

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Algebraic expression is the expression where variables with or without exponents are separated by numerical operations like addition or subtraction.Algebra is an important section in math which involves finding the value of any given algebraic expression and Algebra expression calculator is the online tool which can evaluate an algebraic expression to find its values.

Example 1:Write the algebraic expressions for the following statements:

a)    Sum of 5 with an unknown variableè 5 + x

(Here ‘5’ is called a constant or the ‘numerical value’ and ‘x’ is a variable)

(Variables or unknowns can be represented by any letter)

b)   10 less than twice a number 2x – 10

c)    4 times a number increased by 20 4a + 20

d)   The product of ‘6’ and a number decreased by 15 6x – 15

Example 2: Evaluate the algebraic expression, 5x4 – 3x3 + 6x2 – 4x + 9 when given x = -1.

The above algebraic expression contains variable ‘x’ with different exponents, highest exponent being ‘4’.

So substituting x = -1 in the place of ‘x’ in the above algebraic expression, we get

5(-1)4 – 3(-1)3 + 6(-1)2 – 4(-1) + 9

5(1) – 3(-1) + 6(1) – 4(-1) + 9

5 + 3 + 6 + 4 + 9 = 27

The value of the above algebraic expression is 27