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10 November, 20:53

Write the quadratic equation in general form. What is the value of b 2 - 4ac?

1 = 2x 2 + 7x

40

41

57

+5
Answers (1)
  1. 10 November, 21:20
    0
    0=ax^2+bx+c

    we got

    1=2x^2+7x

    minus 1 both sides

    0=2x^2+7x-1

    a=2

    b=7

    c=-1

    b^2-4ac=

    7^2-4 (2) (-1) =

    49+8=

    57
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