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Find the zeros of polynomial f(x) …

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Find the zeros of polynomial f(x) =x3-5x2-16x+80 if it's two zeros are equal in magnitude but opposite inside sign.

    • Posted by Himanshu Kumar 6 years, 10 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    ?????? (-B±√(B²-4Ac))/(2A) 6 years, 10 months ago

    Let two zeroes are a and b ATQ a+b= 0 a+b+c = 5 c=5 abc = -80 ab5 = -80 ab = -16 b = -a ( from eq. 1) -a^2 = -16 a = +- 4 b = -+4

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