# 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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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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