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:
- 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.
