xy=-50
x+y=2, so y=2-x
Substitute y=2-x to xy=-50
x(2-x)=-50
2x-x2=-50
-x2+2x+50=0
x2-2x-50=0 cannot be factorised.
So use the abc formula
ax2+bx+c=0
a=1, b=-2, c=-50, pm=plus minus, v=square root
x=[-b pm v(b2-4ac)]/2a
x=[2 pm v(4-4.1.-50)]/2.1
x=[2 pm v(204)]/2
x= [2 pm 2v(51)]/2
x=1 pm v(51)
so the answer is 1+v51 and 1-v51
or in decimal (approx): 8.1414 and -6.1414
-936
4760
17
-30
The numbers are: 80 and -20
What to number multiple to get 48 but add to get 13
36
20
-127
-936
-117
4760
17
3452
-17
21
22