a) \(3x-6=3\left(x-2\right)\)
b) \(x^2-4x+4=\left(x-2\right)^2\)
c) \(x^2-y^2+5x-5y=\left(x-y\right)\left(x+y\right)+5\left(x-y\right)\)
\(=\left(x-y\right)\left(x+y+5\right)\)
#heli
+)3x-6=3(x-2)
+)x^2-4x+4=(x-2)^2
+)x^2-y^2+5x-5y
=(x-y)(x+y)+5(x-y)
=(x-y)(x+y+5)