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(x-2a) & #178; - A (2a-x) factorization factor
=x2-3ax+2a2=(x-2a)(x-a)
The equation x2 + 6x + Y2 + 4Y + z2-2z = denotes a sphere whose center is? And radius is
The course x2 + 6x + Y2 + 4Y + z2-2z = 2 means that a ball center is? What is the radius? The sphere of
x^2+6x+y^2+4y+z^2-2z=2
(x+3)^2+(y+2)^2+(z-1)^2=9+4+1＋2=16
Ball center (- 3, - 2,1)
Radius r = 4
Point m (- 3,4), there is a moving point n on the circle x ^ 2 + y ^ 2 = 4, take OM, on as the adjacent sides, make the parallelogram MOPQ, and find the trajectory equation of point P
(x + 3) ^ 2 + (y-4) ^ 2 = 4 is actually the movement of the origin
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