Let the sum of the two numbers x1 and x2 = 31 and their
product x1x2 = 361. We have to find the numbers x1 and
x2.
So x1 and x2 are the roots of x^2-(x1+x2)x+x1x2 = 0,
or
x^2-31x+361 = 0.
We know
that the roots of the equation ax^2+bx+c = 0 is given by:x1 = {-b+sqrt(b^2-4ac)}/2a
and
x2 =
{-b+sqrt(b^2-4ac)}/2.
Here a = 1, b= -31 and c=
361.
So x1 = {-(-31) + sqrt{(-31)^2 -
4*361)}/2
x1 =
{31+sqrt(-483)}/2
x2 =
{31-sqrt(-483)}/2.
Therefore there are no real numbers
whose sum is 31 and the product is 361. However there is solution in complex numbers..
So , x1 = {31+sqrt(-483)}/2 and x2 = {31-sqrt(-483)}/2 are the
solutions.
No comments:
Post a Comment