-(2x-y)^3 gipssssskm

2 câu trả lời

Đáp án:

-(2x-y)^3

= -[(2x)^3 - 3*(2x)^2*y + 3*2x*y^2-y^3]

= - (8x^3 - 12x^2y+6xy^2-y^3)

-(2x-y) ³

= (2x+y) ³

= (2x)³ + 3 ×(2x)² × y + 3 × 2x × y ² +y ³

= 8x ³ + 12x²y + 6xy² + y ³