Question

for what value of k is - 2 a zero of the polynomial 3 X square + 4 x + 2 k?

Answer 1

put x=-2 in the polynomial then,3*-2square+4*-2+2k=0. now,12-8+2k=0. 4+2k=o, 2k= -4. so, k= -4/2,k=-2