Which two numbers add up to 5 and multiply to -45 ?

We have x+y=5
xy=-45
solve
x+y=5
subtract x from both sides
y=-x+5
subsiute -x+5 for y in second equaiton
x(-x+5)=-45
-x^2+5x=-45
add 2x^2-5x to both sides
0=x^2-5x-45
use quadratic equation which is
if you have 0=ax^2+bx+c then x= or
sbsitute
1x^2-5x-45
a=1
b=-5
c=-45
subsitute




or or aprox x=-4.65891 or 9.65891, so the 2 numbers would be those answers for x