rút gọn các phân thức:

a,\(\frac{a^2\left(b-c\right)+b^2\left(c-a\right)+c^2\left(a-b\right)}{ab^2-ac^2-b^3+bc^2}\)b,\(\frac{2x^3-7x^2-12x+45}{3x^3-19x^2+33x-9}\)c,\(\frac{x^3-y^3+z^3+3xyz}{\left(x+y\right)^2+\left(y+z\right)^2+\left(z-x\right)^2}\)

Rút gọn phân thức

1. \(\dfrac{a^2\left(b-c\right)+b^2\left(c-a\right)+c^2\left(a-b\right)}{ab^2-ac^2-b^3+bc^2}\)

2.\(\dfrac{2x^3-7x^2-12x+45}{3x^3-19x^2+33x-9}\)

3.\(\dfrac{x^3-y^3+z^3+3xyz}{\left(x+y\right)^2+\left(y+z\right)^2+\left(z-x\right)^2}\)

4. \(\dfrac{x^3+y^3+z^3-3xyz}{\left(x-y\right)^2+\left(y-z\right)^2+\left(z-x\right)^2}\)

phan tich da thuc thanh nhan tu : a) 3x^2 - 22xy + 4x + 8y + 7x^2 + 1 ; b) 12x^2 + 5x - 12y^2 + 12y - 10xy - 3 ; c)x^4 + 6x^3 + 11x^2 + 6x + 1

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Rút gọn

a)A= 2x^3 – 7x^2 – 12x + 45

           3x^3 – 19x^2 + 33x -9

b) B= x^3 – y^3 + z^3 + 3xyz

         ( x + y)^2+ (y+z)^2+ (z- x)^2

c) C= x^3 + y^3 +z^3  - 3xyz

        (x – y) ^2 +( y- z) ^2 +( z- x )^2

RUT GON PHAN THUC

1)  \(\frac{\left(x-y\right)^3-3xy\left(x+y\right)+y^3}{x-6y}\)

2)  \(\frac{a^2\left(b-c\right)+b^2\left(c-a\right)+c^2\left(a-c\right)}{ab^2-ac^2-b^3+bc^2}\)

3)  \(\frac{2x^3-7x^2-12x+45}{3x^3-19x^2+33x-9}\)

PHAN TICH DA THUC THANH NHAN TU

B= X^3+Y^3+Z^3-3XYZ

phan tich da thuc thanh nhan tu x^3 +y^3-z^3+3xyz

X^3+Y^3+Z^3-3xyz

phan tich da thuc thanh nhan tu

phan tich da thuc thanh nhan tu

x^3+y^3+z^3-3xyz