Question

Evaluate the algebraic expression for the given value of the variable.
x squared plus 2 x​; x equals 4
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Part 1
For x equals 4​, x squared plus 2 xequals
  
enter your response here.
​(Type an integer or a simplified​ fraction.)

Answer 1

To evaluate the expression \( x^2 + 2x \) for \( x = 4 \), we follow these steps:

1. Substitute \( x \) with \( 4 \):
\[
4^2 + 2(4)
\]

2. Calculate \( 4^2 \):
\[
4^2 = 16
\]

3. Calculate \( 2(4) \):
\[
2(4) = 8
\]

4. Add the results:
\[
16 + 8 = 24
\]

Thus, for \( x = 4 \), the value of the expression \( x^2 + 2x \) is \( \boxed{24} \).