Question

Find the value of K for which ‘ –K’ is zero of f(x) = x3 +kx2

-2x +k +6​

Answer 1

Thanks for your question...

Your required answer :

Given :

• -k is zero

1. equation - x³ +kx²
2. equation - -2x +k +6

Solution 1 )

• -k³ + k(-k)²
• -k + k³

Solution 2 )

• -2(-k) + k = -6
• 2k + k = -6
• 3k = -6
• k = - 2

Brainliest Please

Answer 2

$- k = 0$

$k = 0$

$1) \: \: {x}^{3} + k {x}^{2} - 2x + k + 6$

$- k ^{3} + k( - k) ^{2} - 2( - k) + 6 = 0$

$- k ^{3} + {k}^{3} + 2k + k + 6 = 0$

$3k + 6 = 0$

$3k = - 6$

$k = \frac{ - 6}{3}$

$k = - 2$