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__Mathematics__

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__Topic-2 Quadratic equations__

One of the easiest chapter in mathematics and also important for scoring marks in competitive exams [formula based chapter] . This chapter includes ,

- The main concept in this chapter is how to find roots of given quadratic equation both in real and complex equations .
- relationship between roots , nature of roots etc..
- Formation of equations using given roots etc...

Questions that appeared in the recent three years main papers from this chapter are as follows :-

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__Jee mains 2015 paper questions__:-

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__Hint__-

For a given quadratic equation ax

^{2}+ bx + c = 0 . Let p and q be roots of the equation then the sum of roots[p+q] is -b/a and product[pxq] of roots is c/a .###
__Ans(3)__ -3

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__Jee mains 2014 paper questions__:-

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__Hint__-

For a given quadratic equation ax

^{2}+ bx + c = 0 . Let p and q be roots of the equation then the sum of roots[p+q] is -b/a and product[pxq] of roots is c/a . The other conditions given are A.P i.e, 1/p + 1/q = 4 and p + r = 2q . By using these conditions we can find the answer for above problem .### Ans(2)