Math, asked by SiddhartVyas, 18 days ago

if the value of criterion of quadratic equation xcube-3x-k=0 is 1 , then k is ?

Answers

Answered by bendimohini6
0

Given

Quadratic Equation ;

x³ - 3x - k = 0

Given that ;

x = 1

( 1 )³ - 3 ( 1 ) - k = 0

1 - 3 - k = 0

- k = 2

k = -2

Or

Discriminant ( ∆ ) = b² - 4ac

a = 1 ; b = -3 ; c = - k

∆ = ( -3 )² - 4 ( 1 ) ( - k )

∆ = 9 + 4k

4k = -9

k = - 9 / 4

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