Question

Khai triển (x-2y)⁴

Answer 1

\(\left(x-2y\right)^4=x^4-4x^32y+6x^2\left(2y\right)^2-4x\left(2y\right)^3+\left(2y\right)^4\)

\(=x^4-8x^3y+24x^2y^2-32xy^3+16y^4\)

Answer 2

Giúp tui mn ơi

 

Answer 3

`= (x^2 - 4xy + 4y^2)(x^2 - 4xy + 4y^2)`

`= x^4 - 32xy^3 +16y^4 -8yx^3 + 24x^2y^2`