Question

7. If one zero of the quadratic polynomial f(x) = 4x2 - 8kx - 9 is negative of the other,
find the value of k.
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Answer 1

Answer:

k=0

Step-by-step explanation:

Let one zero be x

then other zero will be -x

4x2 - 8kx - 9

a=4 b= -8k c= -9

Now we know that

sum of zeroes = -b/a

x + (-x) = - (-8k)/4

0 = 2k

k=0