Question

x^2-4x-1=0
find the root by applying the quadratic formula.
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Answer 1

Answer:

x²-4x-10=0

D=b²-4ac

= (-4)²-4×1×-10

=15+40

=55

x=(-b+√d)/2a ; (-b-√d)/2a

x=(4+√55)/2 ; (4-√55)2

their real root not possible

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