a^4 - 11*a^2 %2B 10 – InterviewSolution

1.	a^4 - 11*a^2 %2B 10
Answer» a^4 - 11a^2 +10=a^4 - 10a^2 - a^2 +10=a^2 ( a^2 - 10) -1(a^2 -10)=(a^2-1)(a^2-10)=(a-1)(a+1)(a-√10)(a+√10)

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