You replace each variable by its value. Then you do the indicated calculations.
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Replace the variables - wherever they appear in the expression - by their values and then evaluate the expression which should consist only of numbers and arithmetic operations.
To evaluate an expression is nothing but to operate the given expression according to the operators given in the expression if it is evaluable i.e, it could be convertable.
In mathematics, to evaluate means to find the numerical value of an expression or equation. This often involves substituting given values for variables and simplifying the expression using mathematical operations such as addition, subtraction, multiplication, and division. Evaluation is a fundamental process in mathematics that allows us to determine the specific numerical result of a mathematical statement.
Take 3 and substitute into the expression given to you but not mentioned in the question here and evaluate the expression. "Sub and Solve" I say.
4x2-6.5 = 2.5
In mathematics, to evaluate means to find the numerical value of an expression or equation. This involves substituting given values into the expression and simplifying it to obtain a single numerical result. Evaluation is a fundamental process in mathematics used to determine the outcome of mathematical operations and expressions.