Question

find out k, when 3 is a zero of 2x^2+x+k.​

Answer 1

Step-by-step explanation:

Let P(x)= 2x^2 +x +k

Since , 3 is a zero of P(x).

→P(3)=0

→2(9)+3+k=0

→k=-21

Answer 2

Step-by-step explanation:

⭐SOLUTION⭐

since 3 is zero......

polynimial is....

$2 {x}^{2} + x + k..... \\ \\ 3 \: is \:zero.... \\ \\ so......2( {3)}^{2} + 3+k = 0 \\ \\ 18 + 3+k = 0 \\ \\ 3+k = - 18 \\ \\ k = -21$

hope it helps.......✌✌