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प्रश्न
Find the roots of the quadratic equation x2 – x – 2 = 0.
उत्तर
Given quadratic equation is x2 – x – 2 = 0
`\implies` x2 – x – 2 = 0
`\implies` x2 – 2x + x – 2 = 0
`\implies` x(x – 2) + 1(x – 2) = 0
`\implies` (x – 2)(x + 1) = 0
`\implies` x = 2, –1
So, the roots are –1, 2.
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