Question

If y=-1 is a zero of the polynomial q (y) = 4y³+ ky² - y -1, then find the vaLue of k

Answer 1

Explanation:

Since zero of a polynomial function is a value of the variable at which the function's value is 0, 0=4(-1)^3+k(-1)^2-(-1)-1, for the given polynomial q(y)=4y^3+ky^2-y-1

simplifying the above gives: 0= -4+k+0

k=4