Các bạn làm cho mk câu 11 Question Các bạn làm cho mk câu 11 in progress 0 Môn Toán Sapo 1 year 2020-10-14T01:52:34+00:00 2020-10-14T01:52:34+00:00 2 Answers 95 views 0
Answers ( )
$11)_{}$ $2x.(2x-1)^2-3x.(x+3)(x-3)-4x.(x+1)^2_{}$
$=2x.(4x^2-4x+1)-3x.(x^2-9)-4x.(x^2+2x+1)_{}$
$=8x^3-8x^2+2x-3x^3+27x-4x^3-8x^2-4x_{}$
$=x^3-16x^2+25x_{}$
Đáp án:
`2x(2x-1)^2-3x(x+3)(x-3)-4x(x+1)^2`
`=2x(4x^2-4x+1)-3x(x^2-9)-4x(x^2+2x+1)`
`=8x^3-8x^2+2x-3x^3+27x-4x^3-8x^2-4x`
`=x^3-16x^2+25x`