Question

[le quang huy]

pt da thuc sau thanh nhan tu : x^3-9x^2+15x+ 25 ; X^8 - 4X^2- 11X+ 30

2 X^4+X^3 - 22X^2+ 15 X- 36

3X^3+ 5X^2-14X+ 4

2X^3- X^2- 3X -1

MN GIUPS MINH CAU NAY NHA ,MINH DANG CAN GAP, CHIEU NAY NOP

Answer 1

[tthnew]

a) \(x^3-9x^2+15x+25\)

\(=x^3+x^2-10x^2-10x+25x+25\)

\(=x^2\left(x+1\right)-10x\left(x+1\right)+25\left(x+1\right)\)

\(=\left(x+1\right)\left(x^2-2.x.5+25\right)=\left(x+1\right)\left(x-5\right)^2\)

Answer 2

[Hồng Ngọc]