Ta có : x2 - 6x + 5
= x2 - x - 5x + 5
= (x2 - x) - (5x - 5)
= x(x - 1) - 5(x - 1)
= (x - 5)(x - 1)
Tao có \(x^2-6x+5\)
=\(x^2-x-5x+5\)
=\(\left(x^2-x\right)-\left(5x-5\right)\)
=\(x\left(x-1\right)-5\left(x-1\right)\)
=\(\left(x-5\right)\left(x-1\right)\)
x²-6x+5
=x²-x+5x+5
=(x²-x)-(5x-5)
=x(x-1)-5(x-1)
=(x-1)(x-5)