Algebra Practice Test

Question: 1 / 400

If x = 3, what is the value of 2x^2 + 3x?

27

21

To find the value of the expression \(2x^2 + 3x\) when \(x = 3\), you first need to substitute \(3\) into the expression.

Start by calculating \(x^2\):

\[

x^2 = 3^2 = 9

\]

Next, multiply this result by \(2\):

\[

2x^2 = 2 \times 9 = 18

\]

Now calculate \(3x\):

\[

3x = 3 \times 3 = 9

\]

Finally, add the two results together:

\[

2x^2 + 3x = 18 + 9 = 27

\]

This shows that when \(x = 3\), the value for \(2x^2 + 3x\) is \(27\). Therefore, the final correct value of the expression is represented by the choice corresponding to that answer.

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