3 years ago

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

Mathematics

2 answers:

Alex_Xolod [135]3 years ago

5 0

Answer:

Step-by-step explanation:

2x² - x

2(-3)² - (-3)

2(9) + 3

18 + 3

V125BC [204]3 years ago

4 0

Answer:

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

So the final answer is 21

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