\(A=\dfrac{2a\left(x^2-2x+1\right)}{5b\left(1-b\right)}=\dfrac{2a\left(x-1\right)^2}{5b\left(1-b\right)}\)
\(B=\dfrac{\left(x+y+z\right)\left(x+y-z\right)}{x+y+z}=x+y-z\)
Rút gọn:
\(a,\dfrac{2ax^2-4ax+2a}{5b-5bx^2}\)
\(b,\dfrac{\left(x+y^2\right)-z^2}{x+y+z}\)
Rút gọn:
\(\dfrac{2ax^2-4ax+2a}{5b-5bx^2}\)
\(\dfrac{4x^2-4xy}{5x^3-5x^2y}\)
\(\dfrac{\left(x+y\right)^2-z^2}{x+y+z}\)
\(\dfrac{x^6+2x^3y^3+y^6}{x^7-xy^6}\)
Bài 6. Rút gọn các phân thức sau
c) \(\frac{2ax^2-4ax+2a}{5b-5b^2}\)
f) \(\frac{x^6+2x^3y^3+y^6}{x^7-xy^6}\)
rút gọn phân thức
2ax mũ 2 - 4ax + 2a / 5b - 5bx mũ 2
cứu dzớiiiiii
1) Rút gọn bt:
(x+y+z)3+(x-y-z)3+(y-x-z)3+(z-y-x)3
2)Tìm x,y,z t/m: 9x2+y2+2z2-18x+4z-6y+20=0
3)Cho \(\dfrac{x}{a}+\dfrac{y}{b}+\dfrac{z}{c}\)=1 và \(\dfrac{a}{x}+\dfrac{b}{y}+\dfrac{c}{z}\)=0 . CMR:
\(\dfrac{x^2}{a^2}+\dfrac{y^2}{b^2}+\dfrac{z^2}{c^2}\)=1
B=\(\dfrac{x^{2^{ }}+y^2-z^2+2xy}{x^2+z^{2^{ }}-y^2-2xy}\)
rút gọn
1)cho Q=\(\dfrac{a^4+a^3-a^2-2a-2}{a^4+2a^3-a^2-4a-2}\)
Tìm GTNN của Q
2)cho \(\dfrac{x}{a}+\dfrac{y}{b}+\dfrac{z}{c}=1\) và \(\dfrac{a}{x}+\dfrac{b}{y}+\dfrac{c}{z}=0\)
CMR: \(\dfrac{x^2}{a^2}+\dfrac{y^2}{b^2}+\dfrac{z^2}{c^2}=1\)
Rút gọn các phân thức sau:
a) \(\dfrac{a^3+b^3+c^3-3abc}{a^2+b^2+c^2-ab-bc-ca}\)
b) \(\dfrac{x^3-y^3+z^3+3xyz}{\left(x+y\right)^2+\left(x+z\right)^2+\left(z-x\right)^2}\)
rút gọn biểu thức A = \(\dfrac{\left(x+y\right)^2-z^2}{\text{x + y + z}}\)
