X2 + y2 = 100 = r2 r = 10
5
y2 + 8y + 16 = y2 + 4y + 4y + 16 = y(y + 4) + 4(y + 4) = (y + 4)(y + 4) or (y + 4)2
3
x2 +y2 = R2 =16 = radius 2 R = 4
y2 + y2 = 2y2
y2=-x2-8x+6
X2+y2=25 (x-8)2+y2 =41
There is no expansion for x2 + y2
(y2+13y+22)/(y+2) = (y+11)
4
25x2 - 10xy + y2 = (5x - y)2
(2-r)e-rr
This is not factor-able.
(y - 5)(y - 6)
x2 + y2 = 2r2
a2+b2+c2=x2+y2+z2 divide each side by 2 (a2+b2+c2)/2=(x2+y2+z2)/2 a+b+c=x+y+z