(x-2)*(x-1)

(x-2)(x-1)

\(x^2-3x+2=x^2-2x-x+2=x\left(x-2\right)-\left(x-2\right)=\left(x-1\right)\left(x-2\right)\)

\(x^2-9=\left(x-3\right)\left(x+3\right)\)

=x²-9

=x²-3² =(x-3)(x+3)

\(=4xy\left(1-5x^2y+4xy\right)\)

=4xy(1-  5x²y+4xy) 

= 4xy ( 1 - 20x²y + 4xy )

= ( x² - xy) + (x - y)

= x(x - y) + (x - y)

= (x+1)(x-y)

lấy 4xy làm nhân tử chung rồi tính nha

hk tốt nha bn

4x²+4y-4xy-3y²-1

=(4x²-4xy+y²)-(4y²-4y+1)

=(2x-y)²-(2y-1)²

=(2x-y+2y-1)(2x-y-2y+1)

=(2x+y-1)(2x-3y+1)

x² - 4y² + x + 2y

= ( x² - 4y² ) + ( x + 2y )

= ( x - 2y ) ( x + 2y ) + ( x + 2y )

= ( x + 2y ) ( x - 2y + 1 )

\(x^2+5x-36=\left(x-4\right)\left(x+9\right)\)