Question

If x²+2kx +4=0 has a rule x=2 then the value of k is ____________

Answer 1

subsitute the value of x in
${2}^{2} + 2 \times 2k + 4 \\ 4k = - 16 \\ k = - 4$

Answer 2

HEY BUDDY..!!!


HERE IS UR ANSWER...


____________________

⏺️ x^2 + 2 k x + 4 = 0_______( 1 )

▶️ Given , x = 2 ; k = ?

⏺️ We'll put the value of x in eqn ( 1 )

=> x^2 + 2 k x + 4 = 0

=> 2^2 + 2 . 2 . k + 4 = 0

=> 4 + 4 k + 4 = 0

=> 8 + 4 k = 0

=> 4 k = - 8

=> k = - 8 / 4

=> [ k = - 2 ]✔️


HOPE HELPED..


JAI HIND !!!


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