Posted by
KT on
.
if possible, solve the nonlinear system of equations.
x^2+y^2=58
yx=4

Algerbra 
Reiny,
from the 2nd > y = x+4
sub into the 1st
x^2 + (x+4)^2 = 58
2x^2 + 8x+1658 = 0
x^2 + 4x  21 = 0
(x+7)(x3) = 0
x = 7 or x = 3
if x = 7, y = 7+4 = 3
if x = 3 , y = 3+4 = 7
x=3, y=7
or
x=7, y = 3

Algerbra 
KT,
thank you x)