13-04-2016
Mathematics

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Help meeee please in quadratic equation

Help meeee please in quadratic equation class=

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13-04-2016

What part are you wanting to know about? The written of number 9?

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Panoyin Panoyin

13-04-2016

7x² + 31x + 12 = 0

x = -b ± √(b² - 4ac)
2a
x = -(31) ± √((31)² - 4(7)(12))
2(7)
x = -31 ± √(961 - 4(84))
14
x = -31 ± √(961 - 336)
14
x = -31 ± √(625)
14
x = -31 ± 25
14
x = -31 + 25 or x = -31 - 25
14 14
x = -6 or x = -56
14 14
x = ⁻³/₇ or x = -4

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