Question

3x²+4x+2k (x=-2) find k​

Answer 1

Answer:

$3x²+4x+2k \: at \: (x=-2) \\ = > 3({ - 2})^{2} + 4( - 2) + 2k = 0 \\ = > 3(4) - 8 + 2k = 0 \\ = > 12 - 8 + 2k = 0 \\ = > 4 + 2k = 0 \\ = > k = - \frac{4}{2} \\ = > k = - 2$

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

Have to find the value of 'K'

3x²+4x+2k

⇒ 2k = -3x² - 4x

⇒ k = -( 3x² + 4x  )/2

Put 'x' = -2

We get,

-( 3 × 2² + 4 × -2)/2

⇒ -( 3 × 4 + -8)/2

⇒ -( 12 - 8)/2

⇒ -(4/2)

⇒ k = -2