9x2 - 6xy + y2 - 81
= (3x - y)2 - 92
= (3x - y - 9)(3x - y + 9)
The answer? There is no "answer" There cannot be an answer because they are all different. In order to make calculations, the variables have to be the same. x squared, xy, y squared are the variables, and none of them match. Therefore your "answer" must look like this: 9x squared - 6xy + y squared - 81. Hope I Helped :D
9x2 - 6xy + y2 - 81 = (3x - y)2 - 81 = (3x - y - 9)*(3x - y + 9)
3x2+6xy+3y2= 3(x2+2xy+y2)= 3(x+y)2
2x2 + 6xy = 2x (x + 3y)
Type your answer here... 81
(3x + 3y)(x + y) = 3(x + y)2
2xy + 6xy = 8xy
No, it equals -2xy. lrn2math
Totally pointless
6xy +12y = 6y (x+2)
By factorisation: x2 + 6xy - 27y2 = (x + 9y)(x - 3y).
3x