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Find the minimum value of the function 
f(x)=x^(2)+9x+17.3 to the nearest hundredth.
Answer:

Find the minimum value of the function f(x)=x2+9x+17.3 f(x)=x^{2}+9 x+17.3 to the nearest hundredth.\newlineAnswer:

Full solution

Q. Find the minimum value of the function f(x)=x2+9x+17.3 f(x)=x^{2}+9 x+17.3 to the nearest hundredth.\newlineAnswer:
  1. Identify Coefficients: To find the minimum value of the quadratic function f(x)=x2+9x+17.3f(x) = x^2 + 9x + 17.3, we can complete the square or use the vertex formula for a parabola. The vertex form of a parabola is given by f(x)=a(xh)2+kf(x) = a(x - h)^2 + k, where (h,k)(h, k) is the vertex of the parabola. Since the coefficient of x2x^2 is positive, the parabola opens upwards, and the vertex represents the minimum point.
  2. Calculate Vertex Coordinates: First, we identify the coefficients aa, bb, and cc in the standard form of the quadratic equation, which is f(x)=ax2+bx+cf(x) = ax^2 + bx + c. Here, a=1a = 1, b=9b = 9, and c=17.3c = 17.3.
  3. Find x-coordinate of Vertex: The x-coordinate of the vertex hh can be found using the formula h=b2ah = -\frac{b}{2a}. Plugging in the values of aa and bb, we get h=92×1=92=4.5h = -\frac{9}{2 \times 1} = -\frac{9}{2} = -4.5.
  4. Find y-coordinate of Vertex: Now, we will find the y-coordinate of the vertex kk by plugging the value of hh back into the function. So, k=f(4.5)=(4.5)2+9(4.5)+17.3k = f(-4.5) = (-4.5)^2 + 9*(-4.5) + 17.3.
  5. Calculate Minimum Value: Calculating kk, we get k=20.2540.5+17.3=20.25+17.3=2.95k = 20.25 - 40.5 + 17.3 = -20.25 + 17.3 = -2.95.
  6. Determine Vertex of Parabola: Therefore, the vertex of the parabola is at the point (4.5,2.95)(-4.5, -2.95), and since this is a parabola that opens upwards, the yy-coordinate of the vertex represents the minimum value of the function.
  7. Round to Nearest Hundredth: Rounding the minimum value to the nearest hundredth, we get 2.95-2.95 as the minimum value of the function f(x)=x2+9x+17.3f(x) = x^2 + 9x + 17.3.

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