If the equation has four distinct real roots

MATHEMATICS · Single correct · CBSE · Mathematics · Quadratic Equations · Quadratic Equations

Problem

If the equation x4+8x3+18x2+8x+a=0x^4+8x^3+18x^2+8x+a=0 has four distinct real roots, then the range of aa is (a) (0,9)(0,9) (b) (−9,0)(-9,0) (c) (−8,1)(-8,1) (d) (−1,8)(-1,8)

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