Q4 of 83 Page 76

√5x2 – 4x – √5 = 0


⇒ √5x2 – 5x + x – √5 = 0


taking √5x common from first two terms and 1 common from next two


⇒ √5x(x – √5) + 1(x – √5) = 0


⇒ (√5x + 1)(x – √5) = 0


⇒ √5x + 1 = 0 or x – √5 = 0


⇒ √5x = – 1 or x = √5


Therefore and x = √5


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Find the discriminant of the following quadratic equations and discuss the nature of the roots:

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