The complete set of real values of for which the equation has all its roots real is:

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

Problem

The complete set of real values of aa for which the equation x4−2ax2+x+a2−a=0x^4-2ax^2+x+a^2-a=0 has all its roots real is: (A) [34,∞)\left[\frac{3}{4},\infty\right) (B) [1,∞)[1,\infty) (C) [2,∞)[2,\infty) (D) (0,∞)(0,\infty)

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