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Given f(x)=-x^(2)+5x-6, find f(-9) Answer:

Given f(x)=−x2+5x−6 f(x)=-x^{2}+5 x-6 , find f(−9) f(-9) \newlineAnswer:

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Evaluate expression when a complex numbers and a variable term is givenright chevron icon

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Q. Given f(x)=−x2+5x−6 f(x)=-x^{2}+5 x-6 , find f(−9) f(-9) \newlineAnswer:
  1. Substitute xx with −9-9: Given the function f(x)=−x2+5x−6f(x) = -x^2 + 5x - 6, we need to find the value of f(−9)f(-9). To do this, we will substitute xx with −9-9 in the function and simplify.\newlinef(−9)=−(−9)2+5(−9)−6f(-9) = -(-9)^2 + 5(-9) - 6
  2. Calculate (−9)2(-9)^2: First, we calculate (−9)2(-9)^2, which is the square of −9-9.(−9)2=81(-9)^2 = 81
  3. Multiply 55 by −9-9: Next, we multiply 55 by −9-9.5(−9)=−455(-9) = -45
  4. Substitute values and simplify: Now, we substitute these values into the function and simplify.\newlinef(−9)=−(81)+(−45)−6f(-9) = -(81) + (-45) - 6
  5. Perform arithmetic operations: We simplify the expression by performing the arithmetic operations. f(−9)=−81−45−6f(-9) = -81 - 45 - 6
  6. Final value: Adding the numbers together, we get the final value.\newlinef(−9)=−81−45−6=−132f(-9) = -81 - 45 - 6 = -132

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