Question #71224

1 Answer
Nov 29, 2017

There are no solutions

Explanation:

equation 1: # xy = 1441#
equation 2: #x + y = -2# -

rearrange equation 2
equation 3: #y = -2 -x#

substitute for #y# in equation 1 using the value from equation 3
#x(-2-x) = 1441#

simplify
#-x^2 -2x = 1441#

rearrange
#0 = x^2 +2x+ 1441#

we now have a quadratic in the form #y = ax^2 +bx + c#

calculate the discriminant using
#b^2 -4ac#

substitute in what we know
#2^2 - 4*1*1441 = -5760#

The discriminant is negative so the equation has no real roots
Therefore the original pair of equations do not intersect