Question

the value of the expression $2x^2 + 10$ when $x = 3$ is ______

Explanation:

Step1: Substitute x = 3 into the expression

We substitute \( x = 3 \) into \( 2x^2 + 10 \), so we first calculate \( x^2 \) when \( x = 3 \), which is \( 3^2 = 9 \).

Step2: Calculate the term with coefficient

Then we multiply this result by 2: \( 2\times9 = 18 \).

Step3: Add the constant term

Finally, we add 10 to this result: \( 18 + 10 = 28 \).

Answer:

28