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Mathematics
5 October, 08:05
X squared minus 4X minus 11 equals 0
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Jacob Mcconnell
5 October, 08:25
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Hello:
x²-4x-1=0
(x²-2 (2x) + 2²) - 2²-1=0
(x-2) ² - 5 = 0
(x-2) ² - (√5) ² = 0
(x-2 - √5) (x-2+√5) = 0
(x-2-√5=0) or (x-2+√5 = 0)
x=2+√5 or x = 2-√5
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