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1 tháng 11 2015

\(x^3-x^2-8x+12\)

\(=x^3+3x^2-4x^2-12x+4x+12\)

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

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

\(=\left(x+3\right)\left(x-2\right)^2\)

1 tháng 11 2015

\(x^3+8x^2+17x+10\)

\(=x^3+2x^2+x^2+5x^2+10x+5x+2x+10\)

\(=\left(x^3+x^2\right)+\left(2x^2+2x\right)+\left(5x^2+5x\right)+\left(10x+10\right)\)

\(=x^2\left(x+1\right)+2x\left(x+1\right)+5x\left(x+1\right)+10\left(x+1\right)\)

\(=\left(x+1\right)\left(x^2+2x+5x+10\right)\)

\(=\left(x+1\right)\left[x\left(x+2\right)+5\left(x+2\right)\right]\)

\(=\left(x+1\right)\left(x+2\right)\left(x+5\right)\)

23 tháng 6 2017

\(x^2y^2-x^2+8x-16.\)

\(=x^2y^2-x^2+4x+4x-16+x^2y-x^2y+4xy-4xy\)

\(=x^2y^2+x^2y-4xy-x^2y-x^2+4x+4xy+4x-16\)

\(=\left(x^2y^2+x^2y-4xy\right)-\left(x^2y+x^2-4x\right)+\left(4xy+4x-16\right)\)

\(=xy\left(xy+x-4\right)-x\left(xy+x-4\right)+4\left(xy+x-4\right)\)

\(=\left(xy+x-4\right)\left(xy-x+4\right)\)

24 tháng 7 2018

\(x^4-4x^3+8x^2-16x+16 \)

\(=x^3\left(x-2\right)-2x^2\left(x-2\right)+4x\left(x-2\right)-8\left(x-2\right)\)

\(=\left(x-2\right)\left(x^3-2x^2+4x-8\right)\)

\(=\left(x-2\right)\left[x^2\left(x-2\right)+4\left(x-2\right)\right]\)

\(=\left(x-2\right)^2\left(x^2+4\right)\)

22 tháng 11 2017

a, = (x^3-x^2)-(4x^2-4x)+(4x-4)

    = (x-1).(x^2-4x+4) = (x-1).(x-2)^2

b, = (x^3+x^2)-(10x^2+10x)+(16x+16)

 = (x+1).(x^2-10x+16)

 = (x+1).[ (x^2-2x)-(8x-16) ] = (x+1).(x-2).(x-8)

k mk nha

a)= (x^3-x^2)-(4x^2-4x)+(4x-4)

    = (x-1).(x^2-4x+4)

    = (x-1).(x-2)^2

b)= (x^3+x^2)-(10x^2+10x)+(16x+16)

 = (x+1).(x^2-10x+16)

 = (x+1).[ (x^2-2x)-(8x-16) ]

 = (x+1).(x-2).(x-8)

P/s tham khảo nha

8 tháng 8 2018

huhu , ai rảnh thì làm giúp mk vs ạ !!!

8 tháng 8 2018

a)  \(x^3+8x^2+17x+10\)

\(=x^2\left(x+1\right)+7x\left(x+1\right)+10\left(x+1\right)\)

\(=\left(x+1\right)\left(x^2+7x+10\right)\)

\(=\left(x+1\right)\left(x+2\right)\left(x+5\right)\)

b)  \(=x^4-2x^3-12x^2+12x+36\)

\(=x^2\left(x^2-2x-6\right)-2\left(x^2-2x-6\right)\)

\(=\left(x^2-2\right)\left(x^2-2x-6\right)\)

4 tháng 12 2016

a)

\(x^3-3x+2=x^3-x-2x+2=\left(x^3-x\right)-\left(2x-2\right)=x\left(x^2-1\right)-2\left(x-1\right)\)

\(=x\left(x-1\right)\left(x+1\right)-2\left(x-1\right)=\left(x-1\right)\left[x\left(x+1\right)-2\right]\)

b)

\(\left(x^3+3x^2+3x+1\right)+\left(5x^2+10x+5\right)+\left(4x+4\right)\)

\(\left(x+1\right)^3+5\left(x+1\right)^2+4\left(x+1\right)=\left(x+1\right)\left[\left(x+1\right)^2+5\left(x+1\right)+4\right]\)

2 tháng 9 2018

\(x^3-3x+2\)

\(=x^2-x-2x+2\)

\(=\left(x-1\right)\left(x^2+x+1\right)-2\left(x-1\right)\)

\(=\left(x-1\right)\left(x^2+x-1\right)\)

\(=\left(x-1\right)\left(x^2+2\right)\)

8 tháng 10 2015

 

a,x4-4x3+8x2-16x+16

=x4-4x3+4x2+4x2-16x+16

=x2.(x-2)2+4.(x-2)2

=(x-2)2(x2+4)