find the quadratic poly.,the sum and the product of whose zeroes are 2 and -2/5 respectively

Question

anonymous · Answer

$$
x^2 - S x + P =0
$$

asnaseer · Answer

if a quadratic has roots $r_1$ and $r_2$, then it can be written as:$$(x-r_1)(x-r_2)=0$$$$x^2-(r_1+r_2)x+r_1r_2=0$$

asnaseer · Answer

you should be able to solve from here

anonymous · Answer

oh god confusing

asnaseer · Answer

which part is confusing you?

anonymous · Answer

all :P

asnaseer · Answer

do you know what a quadratic equation is?

anonymous · Answer

$$
 x^2 - 2 x - 2/5 = 0\
5 x^2 -10 x -2 =0
$$

asnaseer · Answer

anonymous · Answer

Also the sum and the products of the roots of
$$
a x^2 + b x + c =0
$$
are
$$
S= - \frac ba\
P= \frac c a
$$

anonymous · Answer

i knw

anonymous · Answer

You can practice problems about roots of polynomials on my site http://www.saab.org/mathdrills/act.html

aravindg · Answer

am i late ? :P

anonymous · Answer

Did you understand my solution or @asnaseer which are the same

aravindg · Answer

@Parvathysubhash  any further doubts on this?

anonymous · Answer

ysss @AravindG

aravindg · Answer

wat is it ?

anonymous · Answer

full can u show d entire step of dis question

aravindg · Answer

bt u see @eliassaab has done it very nicely here , can u tell me specifically where u hav doubt on?

anonymous · Answer

i knw its correct bt...??????????