Question

find roots by quadratic formula
$4x ^{2} - 2x - 74 = 0$
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Answer 1

ANSWER..

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$x = 4.31 \: or \: x = - 4.305$

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$4 {x}^{2} - 2x - 74$

a = 4, b = -2 and c = -74

by quadratic formula,

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

$x = \frac{2 + - \sqrt{4 + 1184} }{8}$

$x = \frac{2 + - \sqrt{1188} }{8}$

$x = \frac{2 + - 34.46}{8}$

$x = \frac{2 + 34.46}{8} = \frac{34.48}{8} = 4.31$

$x = \frac{2 - 34.46}{8} = \frac{- 34.44}{8} = - 4.305$

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HOPE U FOUND IT HELPFUL..

Answer 2

Answer:

(4.56, -4.06)

Step-by-step explanation: