Question

Rút gọn biểu thức:

4(x – 6) – x2(2 + 3x) + x(5x – 4) + 3x2(x – 1) = … ?

EM CẦN GẤP Ạ. CẢM ƠN TRƯỚC Ạ.

Answer 1

`4(x-6)-x^2 (2+3x)+x(5x-4)+3x^2 (x-1)`

`=4x-24-2x^2 -3x^3 +5x^2-4x+3x^3-3x^2`

`=-24`

Answer 2

\(4\left(x-6\right)-2x\left(2+3x\right)+x\left(5x-4\right)+3x2\left(x-1\right)\\ =4x-24-4x-6x^2+5x^2-4x+6x^2+6x\\ =2x+5x^2-24\)