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If f(x) = 2x^2 + 3x - 5, what is f(-1)?
If f(x) = 2x^2 + 3x - 5, what is f(-1)?
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Q1
If f(x) = 2x^2 + 3x - 5, what is f(-1)?
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f(-1) = 2(-1)^2 + 3(-1) - 5 = 2 - 3 - 5 = -6.
Questions & Step-by-step Solutions
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Q
Q: If f(x) = 2x^2 + 3x - 5, what is f(-1)?
Solution:
f(-1) = 2(-1)^2 + 3(-1) - 5 = 2 - 3 - 5 = -6.
Steps: 9
Show Steps
Step 1: Identify the function f(x) = 2x^2 + 3x - 5.
Step 2: Substitute -1 for x in the function: f(-1) = 2(-1)^2 + 3(-1) - 5.
Step 3: Calculate (-1)^2, which is 1.
Step 4: Multiply 2 by 1: 2 * 1 = 2.
Step 5: Calculate 3 * (-1), which is -3.
Step 6: Now combine the results: f(-1) = 2 - 3 - 5.
Step 7: First, do 2 - 3, which equals -1.
Step 8: Then, do -1 - 5, which equals -6.
Step 9: Therefore, f(-1) = -6.
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