Problem 8
Question
Evaluate each algebraic expression for the given value or values of the variable(s). $$x^{2}-7 x+4, \text { for } x=8$$
Step-by-Step Solution
Verified Answer
The evaluated expression is 12.
1Step 1: Substitute the value of x into the expression
Replace \(x\) in the expression \(x^{2}-7 x+4\) with the given value 8. This gives us: \(8^{2}-7*8+4\).
2Step 2: Simplify the square
Simplify \(8^{2}\) to get \(64\). So, the expression becomes: \(64-7*8+4\).
3Step 3: Compute the multiplication
Perform the multiplication operation to get \(64-56+4\). According to order of operations (BIDMAS/BODMAS), multiplication/division comes before addition/subtraction.
4Step 4: Simplify the expression
Lastly, simplifying \(64-56+4\) gives us \(12\), which is the expression evaluated for \(x=8\).
Other exercises in this chapter
Problem 8
Evaluate each expression indicate that the root is not a real number. $$ \sqrt{144+25} $$
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Evaluate each exponential expression. $$ (-9)^{0} $$
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simplify each rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression. $$ \frac{x^{2}-12 x+36}{4 x-24}
View solution Problem 9
In Exercises 9–14, perform the indicated operations. Write the resulting polynomial in standard form and indicate its degree. $$ \left(-6 x^{3}+5 x^{2}-8 x+9\ri
View solution