Question 470413
x + y = 11
y = x^2 - 10x + 25
***
y=11-x
y = x^2 - 10x + 25
11-x=x^2-10x+25
0=x^2-9x+14
0=(x-7)(x-2)
x=7 or x=2
y=11-7=4
or y=11-2=9
so (7,4) or (2,9)