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yawa3891 [41]
3 years ago
9

X squared minus 4X minus 11 equals 0

Mathematics
1 answer:
jeyben [28]3 years ago
6 0
Hello:
x²-4x-1=0
(x²-2(2x) +2²)-2²-1=0
(x-2)² -5 = 0
(x-2)²-(<span>√5)² = 0
(x-2-</span>√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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