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4x³-3x²+8x for x =-1?
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4x³-3x²+8x for x =-1?
Step 1: Substitute the Value of x
To evaluate the expression 4x³ - 3x² + 8x for x = -1, we first substitute -1 into the expression:
- 4(-1)³
- - 3(-1)²
- + 8(-1)
Step 2: Calculate Each Term
Now, let's calculate each term separately:
- First Term:
- 4(-1)³ = 4(-1) = -4
- Second Term:
- -3(-1)² = -3(1) = -3
- Third Term:
- 8(-1) = -8
Step 3: Combine the Results
Next, we add the results of each term together:
- -4 + (-3) + (-8)
This simplifies to:
- -4 - 3 - 8
Step 4: Final Calculation
Now, let's perform the addition:
- -4 - 3 = -7
- -7 - 8 = -15
Final Result
The value of the expression 4x³ - 3x² + 8x when x = -1 is:
- -15
This means that when you substitute -1 into the expression, the result is -15.
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4x³-3x²+8x for x =-1?
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