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Determine the value of $k$ for which the equation $x^2-4x+(k-1)=0$ will have equal roots.
in Mathematics by Diamond (62,428 points) | 39 views

1 Answer

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for equal roots

$b^2-4ac=0,

b^2-4ac=4^2-4(1)(k-1),

16-4k+4=0,

20-4k=0,

20=4k.

k=5$
by Wooden (4,328 points)

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