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Question
Discuss the nature of roots of 4x2 − x − 2 = 0
Solution
4x2 – x – 2 = 0
a = 4, b = – 1, c = – 2
∆ = b2 – 4ac
= (–1)2 – 4(4)(– 2)
= 1 + 32
= 33 >0
⇒ The roots are real and distinct
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