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What is the discriminant of the quadratic equation 
5x^(2)-8x+9=0 ?

-244
244
116

-116

What is the discriminant of the quadratic equation 5x28x+9=0 5 x^{2}-8 x+9=0 ?\newline244 -244 \newline244244\newline116116\newline116 -116

Full solution

Q. What is the discriminant of the quadratic equation 5x28x+9=0 5 x^{2}-8 x+9=0 ?\newline244 -244 \newline244244\newline116116\newline116 -116
  1. Identify coefficients and equation: The discriminant of a quadratic equation ax2+bx+c=0ax^2 + bx + c = 0 is given by the formula D=b24acD = b^2 - 4ac. We need to identify the coefficients aa, bb, and cc from the given equation and substitute them into the formula to find the discriminant.
  2. Given quadratic equation: The given quadratic equation is 5x28x+9=05x^2 - 8x + 9 = 0. Here, the coefficient aa is 55, the coefficient bb is 8-8, and the coefficient cc is 99. We will use these values in the discriminant formula.
  3. Substitute values into formula: Substitute a=5a = 5, b=8b = -8, and c=9c = 9 into the discriminant formula D=b24acD = b^2 - 4ac. This gives us D=(8)24(5)(9)D = (-8)^2 - 4(5)(9).
  4. Calculate the discriminant: Calculate the discriminant using the values from the previous step: D=644(5)(9)D = 64 - 4(5)(9). First, calculate the square of 8-8, which is 6464, and then calculate 4×5×94 \times 5 \times 9, which is 180180.
  5. Subtract to find the value: Subtract 180180 from 6464 to find the discriminant: D=64180D = 64 - 180.
  6. Subtract to find the value: Subtract 180180 from 6464 to find the discriminant: D=64180D = 64 - 180.Perform the subtraction to get the final value of the discriminant: D=116D = -116.

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