In the graph you can see the point are crossing Y -1 and x= 2,
x-y=xy
2-1=1
Y=1
9 = 3 x 3
16 = 2 x 2 x 2 x 2
gcf = 1
<span>x^2 + 22x + 121 = 9 + 121 ..............a^2 + 2ab + b^2 = (a+b)^2
(x + 11)^2 = 130
answer
</span><span>you must add 121 to complete the square</span>
