Question

if one of the zero of polynomial 3x2+5x+k is -1, then find k

Answer 1

f(x)= 3x2+5x+k=0

3(-1)^2+5(-1)+k=0

then k=2

Answer 2

Answer:

k=2

Step-by-step explanation:

if -1 is zero of f(x)=3x2+5x+k

then f(-1)=0

3(-1)2+5(-1)+k=0

3*1-5+k=0

3-5+k=0

k=2