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18-01-2016
Mathematics

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Questions 11 & 12, with an explanation - if possible!!

Questions 11 amp 12 with an explanation if possible class=

Respuesta :

Panoyin Panoyin

18-01-2016

x² - 3x - 2 = 0
x = -(-3) ± √((-3)² - 4(1)(-2))
2(1)
x = 3 ± √(9 + 8)
2
x = 3 ± √(17)
2

4x² + 3x + 5
b² - 4ac
(3)² + 4(4)(5)
9 + 4(20)
9 + 80
89

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