Question

Phân tích đa thức thành nhân tử

Answer 1

d) (2x-5y)² -4(2x-5y)

<=> (2x-5y) [(2x-5y)-4]

e) 3x(x-2y)+6y(2y-x)

<=> 3x(x-2y)+6y(-x+2y)<=> 3x(x-2y)+6y[-(x-2y)]

<=> 3x(x-2y)-6y(x-2y)<=> (x-2y)(3x-6y)<=> 3(x-2y)(x-2y)

Answer 2

f) (b-2c)(a-b)-(a+b)(2c-b)

<=> (b-2c)(a-b)-(a+b)(-b+2c) <=> (b-2c)(a-b)-(a+b)[-(b-2c)]

<=> (b-2c)(a-b)+(a+b)(b-2c)<=> (b-2c)[(a-b)(a+b)]

<=> (b-2c)(a²-b²)

g) 6(a-b)x²y+(a-b)²xy

<=> [(a-b)xy](6+x)