Question
Find the roots of the equation 5x2–6x–2=0 by the method of completing the square.
Answer: Option B
:
B
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B
Multiply the equation by 5.
we get 25x2–30x–10=0
(5x)2–[2×(5x)×3]+32–32–10=0
(5x–3)2–9–10=0(5x–3)2–19=0(5x–3)2=195x−3=±√19x=3±√195
Roots of the equation are 3+√195 & 3−√195
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