Given x = - 4 , find the value of: x + 10 2

When each variable in a polynomial is replaced by a given value, it is called substitution. After substituting the given values, the expression is simplified. This is called finding the value of the expression or evaluating the expression. An algebraic expression is a combination of literals and numbers connected by the symbols + , - , × and ÷ . Here the given algebraic expression is x + 10 2 , where x = - 4 substituting the values in the expression we get x + 10 2 = - 4 + 10 2 = 6 2 = 3 ∴ x + 10 2 = 3 .

If a = 5 , b = - 4 , find the value of: 6 a + b b

When each variable in a polynomial is replaced by a given value, it is called substitution. After substituting the given values, the expression is simplified. This is called finding the value of the expression or evaluating the expression. An algebraic expression is a combination of literals and numbers connected by the symbols + , - , × and ÷ . Here the given algebraic expression is 6 a + b b , where a = 5 , b = - 4 substituting the values in the expression we get 6 a + b b = 6 5 - 4 - 4 6 × 1 - 4 = - 6 4 = - 3 2 ∴ 6 a + b b = - 3 2 .

If a = 5 , b = - 4 , find the value of: a - b a + b

When each variable in a polynomial is replaced by a given value, it is called substitution. After substituting the given values, the expression is simplified. This is called finding the value of the expression or evaluating the expression. An algebraic expression is a combination of literals and numbers connected by the symbols + , - , × and ÷ . Here the given algebraic expression is a - b a + b , where a = 5 , b = - 4 substituting the values in the expression we get a - b a + b = 5 - - 4 5 + - 4 = 5 + 4 5 - 4 = 9 1 = 9 ∴ a - b a + b = 9 .