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If one of the zeroes of the quadratic polynomial f(x)=14x² - 42k²x-9 is negative of the other, find the value of 'k'.

2
let the one zero be a then the other is -a so we know sum of roots= - <coefficient of x>/<coefficient of x^2> so a - a = - < - 42k^2>/<14> , 0 = k^2 so k = 0

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