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For the following quadratic equation, find the discriminant.

-4x^(2)+10 x-18=-3x^(2)+7
Answer:

For the following quadratic equation, find the discriminant.\newline4x2+10x18=3x2+7 -4 x^{2}+10 x-18=-3 x^{2}+7 \newlineAnswer:

Full solution

Q. For the following quadratic equation, find the discriminant.\newline4x2+10x18=3x2+7 -4 x^{2}+10 x-18=-3 x^{2}+7 \newlineAnswer:
  1. Bring to Standard Form: First, we need to bring the quadratic equation to standard form, which is ax2+bx+c=0ax^2 + bx + c = 0. To do this, we will move all terms to one side of the equation by adding 3x23x^2 to both sides and subtracting 77 from both sides.\newlineCalculation: 4x2+10x18+3x27=0-4x^2 + 10x - 18 + 3x^2 - 7 = 0
  2. Simplify the Equation: Now, we simplify the equation by combining like terms.\newlineCalculation: (4x2+3x2)+10x+(187)=0(-4x^2 + 3x^2) + 10x + (-18 - 7) = 0\newlineThis simplifies to: x2+10x25=0-x^2 + 10x - 25 = 0
  3. Identify Coefficients: Next, we identify the coefficients aa, bb, and cc from the standard form of the quadratic equation, where aa is the coefficient of x2x^2, bb is the coefficient of xx, and cc is the constant term.\newlineIn our equation, a=1a = -1, b=10b = 10, and bb00.
  4. Calculate Discriminant: 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 will use the values of aa, bb, and cc we found in the previous step to calculate the discriminant.\newlineCalculation: D=(10)24(1)(25)D = (10)^2 - 4(-1)(-25)
  5. Find Discriminant: Now, we perform the calculation to find the discriminant.\newlineCalculation: D=1004×1×25D = 100 - 4 \times 1 \times 25\newlineD=100100D = 100 - 100\newlineD=0D = 0

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