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Question
Select the quadratic equation whose sum of the roots is −1 and product of the roots is −20.
Select the quadratic equation whose sum of the roots is −1 and product of the roots is −20.
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Solution
The correct option is A y=2x2+2x−40
The quadratic equation will be in the form of ax2+bx+c
The sum of roots will be −ba=−1 , which gives b=a
Product of roots will be ca=−20, which gives c=−20a
So, we get a(x2+x−20).
So, the correct answer is option A (we will get it for a=2.
The quadratic equation will be in the form of ax2+bx+c
The sum of roots will be −ba=−1 , which gives b=a
Product of roots will be ca=−20, which gives c=−20a
So, we get a(x2+x−20).
So, the correct answer is option A (we will get it for a=2.
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