Question

Khai triển biểu thức sau: (2x+3y)³

^{Tl giúp em ạ}

Answer 1

Answer 2

(2x+3y)³=8x³+36x²y+54xy²+27y³

Answer 3

\(\left(2x+3y\right)^3=8x^3+36x^2y+54xy^2+27y^3\)

Answer 4

Ta có: \(\left(2x+3y\right)^3\)

\(=\left(2x\right)^3+3\cdot4x^2\cdot3y+3\cdot2x\cdot9y^2+\left(3y\right)^3\)

\(=8x^3+36x^2y+54xy^2+27y^3\)