adam23
adam23
13-04-2016
Mathematics
contestada
Help meeee please in quadratic equation
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TopHat
TopHat
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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