Which expression is NOT equivalent to 3(x + 3)?

A 3x + 93 x + 9
B (3 + x) • 3(3 + x ) • 3
C 3(x + 9)3( x + 9)
D 3 • x + 3 • 33 • x + 3 • 3

1 answer

To determine which expression is NOT equivalent to \(3(x + 3)\), we first simplify \(3(x + 3)\):

\[ 3(x + 3) = 3x + 9 \]

Now let's evaluate each option:

Option A: \(3x + 9\)

This is exactly equal to \(3(x + 3)\).

Option B: \((3 + x) \cdot 3(3 + x)\)

Simplifying this:

\[ (3 + x) \cdot 3(3 + x) = 3(3 + x)(3 + x) = 3(3 + x)^2 \] This is not equal to \(3(x + 3)\).

Option C: \(3(x + 9)\)

This can be simplified to:

\[ 3(x + 9) = 3x + 27 \] This is also not equal to \(3(x + 3)\).

Option D: \(3 \cdot x + 3 \cdot 33 \cdot x + 3 \cdot 3\)

First, let's analyze it for the correct multiplication:

\[ 3 \cdot x + 3 \cdot 33 \cdot x + 3 \cdot 3 = 3x + 99x + 9 = 102x + 9 \]

This is also not equal to \(3(x + 3)\).

Now, since we see that options B, C, and D are not equivalent to \(3(x + 3)\)—let's clarify.

Option B simplifies incorrectly, Option C evaluates to something entirely different, and Option D expands incorrectly as well. Yet we need just one.

The final conclusion is:

Answer: A \(3x + 9\) is the correct equivalent expression. B 3(3 + x)^2, C 3(x + 9), D 102x + 9 are NOT equal.

Thus, the final examined options clearly suggest:

B, C, D are candidates not equivalent. The most clean-cut misaligned option that diverges from original simplifications is B. To summarize: There are several lies among and B leads among misalignments distinctly.