agfvHazha agfvHazha
  • 22-03-2018
  • Mathematics
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Write the quadratic equation in standard form. What is the value of b 2 - 4ac?

1 = 2x 2 + 7x

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sqdancefan
sqdancefan sqdancefan
  • 25-03-2018
Subtracting 1 (and using appropriate math symbols), the standard form of the equation is
  2x^2 +7x -1 = 0

You have
  a = 2
  b = 7
  c = -1
so the discriminant b^2 -4ac is
  7^2 -4(2)(-1) = 49 +8 = 57
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