Question

plese sloveplese sloveplese sloveplese plese sloveplese slove​

Answer 1

Step-by-step explanation:

3 is a root of a equation mean x=3

then 2x square +x + K = 0

= 2*3 square +3+k =0

= 18 +3+k = 0

=21+k = 0

= K = -21

so your answer is. a) -21