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Question

If a and b are roots of the equation x2 + ax + b = 0, then a + b =

(a) 1
(b) 2
(c) −2
(d) −1

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Solution

The given quadric equation is , and their roots are a and b

Then find the value of

Let be two roots of given equation

And,

Then, as we know that sum of the roots

And the product of the roots

Putting the value of a in above

Therefore, the value of

Thus, the correct answer is


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