Rút gọn các phân thức sau :
a) dfrac{x^2-16
}{4x-x^2} ( x ne x , x ne 4 )
b) dfrac{x^2+4x+3}{2x+6} ( x ne -3 )
c) dfrac{15xleft(x+yright)^3}{5yleft(x+yright)^2} ( y + ( x + y ) ne 0 )
d) dfrac{5left(x-yright)-3left(y-xright)}{10left(x-yright)} ( x ne y )
e) dfrac{2x+2y+5x+5y}{2x+2y-5x-5y} ( x ne - y )
f)dfrac{x^2-xy}{3xy-3y^2} ( x ne y , y ne 0 )
g) dfrac{2ax^2-4ax+2a}{5b-5bx^2} ( b ne 0 , x nepm1 )
h) dfrac{4x^2-4xy}{5x^3-5x^2y}left(xne0,xne yright)
i) dfrac{left(x+yright)^2-z^2}{x+y+z}l...
Đọc tiếp
Rút gọn các phân thức sau :
a) \(\dfrac{x^2-16
}{4x-x^2}\) ( x \(\ne\) x , x \(\ne\) 4 )
b) \(\dfrac{x^2+4x+3}{2x+6}\) ( x \(\ne\) -3 )
c) \(\dfrac{15x\left(x+y\right)^3}{5y\left(x+y\right)^2}\) ( y + ( x + y ) \(\ne\) 0 )
d) \(\dfrac{5\left(x-y\right)-3\left(y-x\right)}{10\left(x-y\right)}\) ( x \(\ne\) y )
e) \(\dfrac{2x+2y+5x+5y}{2x+2y-5x-5y}\) ( x \(\ne\) - y )
f)\(\dfrac{x^2-xy}{3xy-3y^2}\) ( x \(\ne\) y , y \(\ne\) 0 )
g) \(\dfrac{2ax^2-4ax+2a}{5b-5bx^2}\) ( b \(\ne\) 0 , x \(\ne\pm\)1 )
h) \(\dfrac{4x^2-4xy}{5x^3-5x^2y}\left(x\ne0,x\ne y\right)\)
i) \(\dfrac{\left(x+y\right)^2-z^2}{x+y+z}\left(x+y+z\ne0\right)\)
k)\(\dfrac{x^6+2x^3y^3+y^6}{x^7-xy^6}\left(x\ne0,x\ne y\right)\)
Help me!!!