Question

1. $x=-2$, $3x^{2}-x$

Explanation:

Step1: Substitute $x=-2$ into expression

$3(-2)^2 - (-2)$

Step2: Calculate exponent term first

$3(4) - (-2)$

Step3: Perform multiplication

$12 - (-2)$

Step4: Simplify the subtraction

$12 + 2$

Answer:

14