Question

82) phân tích các đa thức sau thành nhân tử 1) 6x^3 -9x^2 2) x^3-x^4 3) 4x^2y -8xy^2+ 18x^2y^2 4) -8x^4y^3 -12x^2y^4 +20x^3y^4 5) 18x^2y -12x^3 6) 3xy^2+ 6xy^2 7) x^m+2 -x^m 8) 5x^m+2 +10x^2

Answer 1

1: \(6x^3-9x^2=3x^2\left(2x-3\right)\)

2: \(x^3-x^4=x^3\left(1-x\right)\)

3: \(=2xy\left(2x-4y+9xy\right)\)

4: \(-8x^4y^3-12x^2y^4+20x^3y^4\)

\(=-4x^2y^3\left(2x^2y+3y-5xy\right)\)

Answer 2

`5)18x^2y-12x^3=6x^2(3y-2x)`

`6)3xy^2+6xy^2=9xy^2`

`7)x^m+2-x^m=2`

`8)5x^m+2+10x^2=6x^m+2(1+5x^2)`