x2 - y2 + 9x - 9y =(x2 + 9x) - (y2 + 9y) =x(x + 9) - y(y + 9)================================Another way to go after it:x2 - y2 + 9x - 9y =(x2 - y2) + 9x - 9y =(x + y) (x - y) + 9 (x - y) =(x + y + 9) (x - y)
(x - y)2 = x2 - 2xy + y2
7(3y-2)-(-4y+9)
y² - y all depends on the value of y. If you want to factor the expression, then we have y(y - 1)
y^3 + y^2 - 6 (y+2) (y-3) i think
(y - 8)(y - 2)
y squared minus 9 (y*y)- 9 cannot be solved because there is no given value for 9.
9x2 - 6xy + y2 - 81 = (3x - y)2 - 81 = (3x - y - 9)*(3x - y + 9)
9x2 - 6xy + y2 - 81 = (3x - y)2 - 92 = (3x - y - 9)(3x - y + 9)
5
y2-y-72 is an algebraic expression that can be factored as: (y+8)(y-9)
y squared-y-72 is an algebraic expression because it does not contain an equality sign.
2
x2 - y2 + 9x - 9y =(x2 + 9x) - (y2 + 9y) =x(x + 9) - y(y + 9)================================Another way to go after it:x2 - y2 + 9x - 9y =(x2 - y2) + 9x - 9y =(x + y) (x - y) + 9 (x - y) =(x + y + 9) (x - y)
y² - y - 6 = (y + 2)(y - 3)
(9y+2z)(y-3z)
it is (x-y)(x-y) :)