Question

find k x =4 8n quadratic equation

Answer 1

$<b><font face=copper black size=4 colour=purple>$Given :

x = 4

Equation :

f ( x ) = 3x² + kx - 2 = 0

3 ( 4 )² + k ( 4 ) - 2 = 0

3 × 16 + 4k - 2 = 0

48 + 4k - 2 = 0

46 + 4k = 0

4k = - 46

k = - 46 / 4

k = - 23 / 2

^^"

Answer 2

Answer:

given,

        x=4

       Question find k in 3x^2=kx-2=0

Now, substitute x = 4 in the equation,

=) 3(4)^2=k(4)-2=0

=) 3(16)=4k-2=0

=) 48+4k-2=0

=) 48-2+4k=0

=) 46+4k=0

=) 4k=-46

=) k= -46/4

:k= -11.5

Step-by-step explanation: