Answer :

Final answer:

Substitute -10 for x in the given expression and simplify to find the value.


Explanation:

To find the value of the expression 2x¹ - x³ + x² - x - 19 when x = -10, we substitute -10 for x:




  1. 2(-10)¹ - (-10)³ + (-10)² - (-10) - 19



Simplifying this expression gives us:




  • 2(-10) - (-10)(-10)(-10) + (-10)(-10) - (-10) - 19

  • -20 - (-1000) + 100 - (-10) - 19

  • -20 + 1000 + 100 + 10 - 19

  • 1081



Therefore, when x = -10, the value of the expression 2x¹ - x³ + x² - x - 19 is 1081.


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By substituting x with -10 in the expression 2x¹ - x³ + x² - x - 19 and calculating step by step, the value of the expression is found to be 1071.

The question asks for the value of the expression 2x¹ - x³ + x² - x - 19 when x = -10.

First, let's substitute -10 for x and calculate step by step:

2(-10)¹ = 2(-10) = -20

-(-10)³ = -(-1000) = 1000

(-10)² = 100

-(-10) = 10

-19 is a constant

Now, adding these values together:

-20 + 1000 + 100 + 10 - 19 = 1071.

Therefore, the value of the expression when x = -10 is 1071.