Question

if 3 is zero of ×2+5×+k, the k=​

Answer 1

Answer:

Hey Mate..!!

..ur answer is here...

..

putting the value of X ..as (3)...

..

${(3)}^{2} + 5(3) + k = 0 \\ 9 + 15 + k = 0 \\ 18 + k = 0 \\ \rightarrow \boxed{ \green{k = - 18}}$

hope it helps you...

THANKYOU....

Answer 2

Answer:x-3=0

x-3

Putting in Equation

2x-3+5x-3+k=0

-6+{-15}+k=0

-21+k=0

k=21