Question

if one of the zeroes of quadratic polynomial f(x)=14x*x-42k*kx-9is negative of other ,find value of k

Answer 1

Let the zeroes be a and b
since,
a+b=42k²x/14
a+(-a)=3k²x (since its given that b=-a)
0=3k²x
k²x=0
k=0

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