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Solve the quadratic equation 2x2+18x4=02x^2+18x-4=0

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Q. Solve the quadratic equation 2x2+18x4=02x^2+18x-4=0
  1. Identify quadratic equation: Identify the quadratic equation to be solved.\newlineThe given quadratic equation is 2x2+18x4=02x^2 + 18x - 4 = 0.
  2. Factor if possible: Factor the quadratic equation if possible.\newlineThe quadratic equation does not factor nicely, so we will use the quadratic formula to find the roots.\newlineThe quadratic formula is x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}, where aa, bb, and cc are the coefficients from the quadratic equation ax2+bx+c=0ax^2 + bx + c = 0.
  3. Identify coefficients: Identify the coefficients aa, bb, and cc from the quadratic equation.\newlineFor the equation 2x2+18x4=02x^2 + 18x - 4 = 0, we have:\newlinea=2a = 2, b=18b = 18, and c=4c = -4.
  4. Calculate discriminant: Calculate the discriminant b24acb^2 - 4ac.Discriminant=b24ac\text{Discriminant} = b^2 - 4acDiscriminant=(18)24(2)(4)\text{Discriminant} = (18)^2 - 4(2)(-4)Discriminant=324+32\text{Discriminant} = 324 + 32Discriminant=356\text{Discriminant} = 356
  5. Calculate roots: Calculate the roots using the quadratic formula.\newlinex=b±discriminant2ax = \frac{-b \pm \sqrt{\text{discriminant}}}{2a}\newlinex=18±3562×2x = \frac{-18 \pm \sqrt{356}}{2 \times 2}\newlinex=18±3564x = \frac{-18 \pm \sqrt{356}}{4}
  6. Simplify roots: Simplify the roots. \newlinex=18+3564x = \frac{{-18 + \sqrt{356}}}{{4}} or x=183564x = \frac{{-18 - \sqrt{356}}}{{4}}\newlineThese are the most simplified forms of the roots as the square root of 356356 cannot be simplified further.