Question

Gíup câu dứới rút gọn cần gấp

Answer 1

`(x+2)^3-(x-2)^2`

`=x^3+6x^2+12x+8-x^2+4x-4`

`=x^3+5x^2+16x+4`

Answer 2

\(\left(x+2\right)^3-\left(x-2\right)^2\)

\(\Leftrightarrow x^3+6x^2+12x+8-\left(x^2-4x+4\right)\)

\(\Leftrightarrow x^3+6x^2+12x+8-x^2+4x-4\)

\(\Leftrightarrow x^3+5x^2+16x+4\)