63
We are missing an important sign (+/-) I shall assume 9x2 - 18xy + 9y2 9(x-y)(x-y)
the GCF is 6y
To factor a perfect square, it should be in the form a2+2ab+b2 For example: 9x2+18xy+9y2 First factor out the 9: 9(x2+2xy+y2) Make a2+2ab+b2 into (a+b)2 : 9(x+y)2
a proper factor is a factor.
63
We are missing an important sign (+/-) I shall assume 9x2 - 18xy + 9y2 9(x-y)(x-y)
18xy is the GCF of 72x2y and 18xy
y(x - 9)(x - 9)
It is -18xy
2y(x - 5)(x^2 + 9)
GCF(18xy, 15xy) = 3xy LCM(18xy, 15xy) = 90xy
(3x - y)(3x - 5y) and (2x + 1)(2x + 11)
72xy
lcm(8x, 18xy) = 72xy 8x = 23 x x 18xy = 2 x 32 x x x y lcm = 23 x 32 x x x y= 72xy
the GCF is 6y
xy