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In mathematics, the term “evaluate” refers to finding the numerical value or result of a mathematical expression or equation. For example, to evaluate the expression “5 + 3” means to perform the addition and find the sum, which is 8.
What does it mean to evaluate the expression? To evaluate the expression means to substitute the variable (s) of a polynomial with given value (s). For example, If x = 6, what is the value of 6x + 1? Substitute 6 for x and follow the order of operations: 6(6) + 1 = 36 + 1 = 37. The same process can be used when there is more than one variable.
May 2, 2022 · Example \(\PageIndex{6}\): evaluate. Evaluate \(2x^2 + 3x + 8\) when \(x = 4\). Solution. We need to be careful when an expression has a variable with an exponent. In this expression, \(2x^2\) means \(2 • x • x\) and is different from the expression \((2x)^2\), which means \(2x • 2x\).
May 28, 2023 · To evaluate an algebraic expression means to find the value of the expression when the variable is replaced by a given number. To evaluate an expression , we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.
In this section, we’ll evaluate expressions—again following the order of operations. To evaluate an expression, we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.
Jan 16, 2024 · Determine how to evaluate the expression. Evaluate means to simplify an expression. When you are asked to evaluate an algebraic expression, you need to plug a given value for the variable into the expression and solve. For example, you might be asked to evaluate when =.
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To evaluate a function is to: Replace (substitute) any variable with its given number or expression. Like in this example: Example: evaluate the function f (x) = 2x+4 for x=5. Just replace the variable "x" with "5": f (5) = 2× 5 + 4 = 14. Answer: f (5) = 14.
