Question

If one zero of P(x) = 4 x2 – (8 k2 – 40 k) x – 9 is negative of the other find the valueof k

Answer 1

P(x) =4*2-(8k2-40k)
P(x) =x+9
P(-9)=8-(16k-40k)=0
=8-32k=0
32k=-8
K=8/32
=1/4