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Given f(x)=-x^(2)-3x+19, find f(-9) Answer:

Given f(x)=−x2−3x+19 f(x)=-x^{2}-3 x+19 , find f(−9) f(-9) \newlineAnswer:

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Composition of linear and quadratic functions: find a valueright chevron icon

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Q. Given f(x)=−x2−3x+19 f(x)=-x^{2}-3 x+19 , find f(−9) f(-9) \newlineAnswer:
  1. Substitute Value into Function: Substitute the value −9-9 into the function f(x)f(x).f(−9)=−(−9)2−3(−9)+19f(-9) = -(-9)^2 - 3(-9) + 19
  2. Calculate Square: Calculate the square of −9-9.(−9)2=81(-9)^2 = 81
  3. Multiply by −3-3: Multiply −3-3 by −9-9.−3(−9)=27-3(-9) = 27
  4. Combine Results with Constant Term: Combine the results from Step 22 and Step 33 with the constant term 1919.f(−9)=−(81)+27+19f(-9) = -(81) + 27 + 19
  5. Perform Arithmetic Operations: Perform the arithmetic operations.\newlinef(−9)=−81+27+19f(-9) = -81 + 27 + 19\newlinef(−9)=−54+19f(-9) = -54 + 19\newlinef(−9)=−35f(-9) = -35

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