( x + 2xy ) * ( 2x - 1 )
x-y x^2-2xy+y^2 x+y
(x^3-2x^2y+y^2x+2x^2y-2xy^2)* ( 2x - 1 )
(x-y) (x^2-2xy+y^2 ) x+y
(x^3-2x^2y+y^2x+2x^2y-2xy^2) *(2x - 1 )
(x-y) (x^2-2xy+y^2 )( x+y)
(x^3-xy^2) *(2x - 1 )
(x-y) (x^2-2xy+y^2 )( x+y)
x(x^2-y^2)*(2x - 1 )
(x-y) (x^2-2xy+y^2 )( x+y)
x((x-y)(x+y)))*(2x - 1 )
(x-y) (x^2-2xy+y^2 )( x+y)
x*(2x - 1 )
(x^2-2xy+y^2 )
x*(2x - 1 )
(x-y)^2
подставляем
-2(-4-1) = 10
9 9
1) 9m⁶-169n⁶ = (3m³)² - (13n³)² = (3m³-13n³)(3m³+13n³)
2) 0,01m⁶ - 1 = (0,1m³)² - 1² = (0,1-m³)(0,1+m³)
3) 8m⁶ - 0,125n³ = (2m²)³ - (0,5n)³ = (2m² - 0,5n)(4m⁴+m²n+0,25n²)
4) a³ + 0,064b³ = a³ + (0,4b)³ = (a+0,4b)(a²-0,4ab+0,16b²)