find multipules of 10
1 and 10
2 and 5
1+10=11 NO
2+5=7 ono
so do
x+y=16
xy=10
x+y=16
subtract x from both sides
y=16-x
subsitute
x(16-x)=10
distribute
16x-x^2=10
add x^2 to btoh sides
16x=x^2+10
subtrac 16 x from oth sies
0=x^2-16x+10
use quadratic formula which is
x=

when you have
0=ax^2+bx+c
0=x^2-16+10
a=1
b=-16
c=10
subsitute
x=

x=

x=

x=

x=

x=8+

or 8-

aprox
x=15.3485 or 0.651531
so thos are the 2 numbers