Question

if x+2 is factor of 2x³-5+k then k=?​

Answer 1

Refer to the attachment!!

Answer 2

Answer:

$x = - 2. \\ 2x {}^{3} - 5 + k. \\ 2( - 2) {}^{3} - 5 + k. \\ 2( - 8) - 5 + k. \\ - 16 - 5 + k. \\ - 21 + k. \\ k = 21.$