Evaluate the expression 2x^2 - x, when x = - 3. Show all steps.

21

Step-by-step explanation:

2x² - x

2 (-3) ² - (-3)

2 (9) + 3

18 + 3

21

21

Step-by-step explanation:

This is a substitution question, we are to substitute a given value in place of a certain letter

So let's solve

2x^2-x

And since x is given to be - 3

So let's substitute

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

2 (9) - (-3)

18+3

21

So the final answer is 21