Toán Phân tích đa thức thành nhân tử : 2x^3+6x-8x^2 24/11/2021 By Everleigh Phân tích đa thức thành nhân tử : 2x^3+6x-8x^2
`2x^3 + 6x – 8x^2` `= 2x ( x^2 + 3 – 4x )` `= 2x ( x^2 + 3 + 1 – 1 – 4x )` `= 2x ( x^2 + 4 – 1 – 4x )` `= 2x [ ( x^2 – 4x + 4 ) – 1 ]` `= 2x [ ( x – 2 )^2 – 1^2 ]` `= 2x ( x – 2 – 1 ) ( x – 2 + 1 )` `= 2x ( x – 3 ) ( x – 1 )` Trả lời
`2x³+6x-8x²` `=2x(x²+3-4x)` `=2x(x²-4x+3+1-1)` `=2x(x²-4x+4-1)` `=2x[(x-2)²-1²]` `=2x(x-2+1)(x-2-1)` `=2x(x-1)(x-3)` `#Study well` Trả lời
`2x^3 + 6x – 8x^2`
`= 2x ( x^2 + 3 – 4x )`
`= 2x ( x^2 + 3 + 1 – 1 – 4x )`
`= 2x ( x^2 + 4 – 1 – 4x )`
`= 2x [ ( x^2 – 4x + 4 ) – 1 ]`
`= 2x [ ( x – 2 )^2 – 1^2 ]`
`= 2x ( x – 2 – 1 ) ( x – 2 + 1 )`
`= 2x ( x – 3 ) ( x – 1 )`
`2x³+6x-8x²`
`=2x(x²+3-4x)`
`=2x(x²-4x+3+1-1)`
`=2x(x²-4x+4-1)`
`=2x[(x-2)²-1²]`
`=2x(x-2+1)(x-2-1)`
`=2x(x-1)(x-3)`
`#Study well`