Root of equation x2 – 9 = 0 are(A) √3(B) -√3(C) 9(D) ±3 – InterviewSolution

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1.

Root of equation x2 – 9 = 0 are(A) √3(B) -√3(C) 9(D) ±3

Answer»

Answer is (D) ±3

x² – 9 = 0

⇒ x² = 9

⇒ x = ±√9

⇒ x = ± 3

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