What is 4x squared?
Understand the Problem
The question is asking for the expression 4x squared, which represents the mathematical operation of squaring the variable x and then multiplying the result by 4. It could be interpreted as simplifying or evaluating the expression for a specific value of x.
Answer
$36$ when $x = 3$.
Answer for screen readers
The expression $4x^2$ evaluates to $36$ when $x = 3$.
Steps to Solve
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Understanding the expression The expression given is $4x^2$. Here, you need to square the variable $x$ and then multiply the result by 4.
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Substituting a value (if required) If you have a specific value for $x$, substitute that value into the expression. For example, if $x = 3$: $$ 4(3)^2 $$
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Calculating the square of x First, calculate the square of $x$. Using the previous example: $$ (3)^2 = 9 $$
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Multiplying by 4 Now multiply the result by 4: $$ 4 \times 9 = 36 $$
The expression $4x^2$ evaluates to $36$ when $x = 3$.
More Information
The expression $4x^2$ represents a parabola when graphed against $x$. The coefficient 4 determines how "steep" the parabola is.
Tips
- Forgetting to square the variable: Always remember to square the variable before multiplying.
- Incorrect arithmetic: Double-checking calculations can help avoid simple mistakes in multiplication.
