math

Solve each equation by using the Quadratic Formula. Round to the nearest tenth if necessary.


1.6x2 + 2x + 2.5 = 0

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asked by Sally
  1. I need help

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    posted by Marina
  2. a = 1.6
    b = 2
    c = 2.5

    x = (-b ± √(b^2 - 4ac)/(2a)
    (you MUST memorize this formula)

    x = (-2 ± (√(4 - 4(1.6)(2.5))/3.2
    = (-2 ± √-12)/3.2
    This is a complex or imaginary number, so there is no REAL solution.
    Is that your problem?
    Have you studied complex numbers?

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    posted by Reiny

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