$\left(x^{2}-1\right)\cdot \left(2x^{2}-3x+4\right)$ câu hỏi 8039228 - hoidap247.com

Question

$\left(x^{2}-1\right)\cdot \left(2x^{2}-3x+4\right)$

224488 · Answer

`( x^2 - 1 )( 2x^2 - 3x + 4 )`
`= x^2( 2x^2 - 3x + 4 ) - ( 2x^2 - 3x + 4 )`
`= 2x^4 - 3x^3 + 4x^2 - 2x^2 + 3x - 4`
`= 2x^4 - 3x^3 + 2x^2 + 3x - 4`

25251368 · Answer

`(x^2-1)(2x^2-3x+4)`
`=x^2(2x^2-3x+4)-1(2x^2-3x+4)`
`=2x^4-3x^3+4x^2-2x^2+3x-4`
`=2x^4-3x^3+2x^2+3x-4`

\(\left(x^{2}-1\right)\cdot \left(2x^{2}-3x+4\right)\)