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Alina [70]
3 years ago
10

Susie is solving the quadratic​

Mathematics
1 answer:
topjm [15]3 years ago
5 0

Answer:

Option (D)

Step-by-step explanation:

Standard equation of a quadratic function is,

ax² + bx + c

Comparing this function with the given quadratic function,

f(x) = 2x² - 4x - 3

a = 2, b = -4 and c = -3

By using quadratic formula to get the value of x,

x = \frac{-b\pm \sqrt{b^2-4ac} }{2a}

  = \frac{-(-4)\pm \sqrt{(-4)^2-4(2)(-3)} }{2(2)}

  = \frac{4\pm\sqrt{16+24}}{4}

  = \frac{-4\pm \sqrt{40}}{4}

  = \frac{-2\pm \sqrt{10}}{2}

Therefore, Susie made a mistake in step IV.

Option (D) is the answer.

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