Question

If y=-1 is a zero of the polynomial q (y) = 4y^3
+ ky^2
- y -1, then find the value of k​

Answer 1

Step-by-step explanation:

q (y) = 4y^3+ ky^2- y -1

Just substitute y=-1 in q(y)

0= 4(-1)^3+k(-1)^2-(-1)-1

0=-4+k+1-1

0=-4+k

k=4

Answer 2

Answer:q (y) = 4y^3+ ky^2- y -1

Just substitute y=-1 in q(y)

0= 4(-1)^3+k(-1)^2-(-1)-1

0=-4+k+1-1

0=-4+k

k=4

Step-by-step explanation: