$\text{1. 3x-3y+3z}$
$\text{=3(x-y+z)}$
$\text{2.$a^{2}$ x+$a^{2}$ y+$a^{2}$ z-$a^{2}$ }$
$\text{=$a^{2}$ (x+y+z-1)}$
$\text{3. m$x^{2}$ -m$y^{2}$ }$
$\text{=m($x^{2}$ -$y^{2}$ )}$
$\text{=m(x-y)(x+y)}$
$\text{4. 5($x^{2}$ +10xy+5$y^{2}$ }$
$\text{=5($x^{2}$ +2xy+$y^{2}$ }$
$\text{=5($x+y)^{2}$ }$
$\text{5. a$x^{3}$ +a$y^{3}$ }$
$\text{=a($x^{3}$+ $y^{3}$ )}$
$\text{=a(x+y)($x^{2}$ -xy+$y^{2}$ )}$
$\text{6.K$x^{3}$ -K$y^{3}$ }$
$\text{=k($x^{3}$ -$y^{3}$ )}$
$\text{=K(x-y)($x^{2}$ +xy+$y^{2}$ )}$
$\text{7. -9$a^{2}$ +6ab-$b^{2}$ }$
$\text{=-(9$a^{2}$ -6ab+$b^{2}$ )}$
$\text{=($-3a-b)^{2}$ }$
$\text{8.-25$m^{2}$ -10m-1}$
$\text{=-25$m^{2}$ -5m-5m-1}$
$\text{=-5m(5m+1)-(5m+1)}$
$\text{=-(5m+1)(5m+1)}$
$\text{=-($5m+1)^{2}$ }$
$\text{9. 2x-2y+kx-ky}$
$\text{=2(x-y)+k(x-y)}$
$\text{=(x-y)(2+k)}$
$\text{10. $x^{2}$ -$y^{2}$ +x-y}$
$\text{=(x-y)(x+y)+x-y}$
$\text{=(x-y)(x+y+1)}$
#Zie
