cho 2 đa thức \(A=2\times x^2\times y^3-3\times x^3\times y^2+x^2\times y^2+1\)

\(B=2\times x^2\times y^3-3\times x^3\times y^2-x^2\times y^2+2\)

 Tính \(2\times A-\left(B-\left(A-\left(-4\times B\right)\right)\right)\)

Tìm x,y biết

\(\left(x-3\right)^2+\left(y+2\right)^2=0\)

\(2\times x+2^{x+3}=136\)

\(\left(x-12+y\right)^{200}+\left(x-4-y\right)^{200}=0\)

\(\left(2\times x-5\right)^{2000}+\left(3\times y+4\right)^{2002}\le0\)

tìm x             \(6\times\left(x-\frac{1}{y}\right)=3\times\left(y-\frac{1}{z}\right)=2\times\left(z-\frac{1}{x}\right)\)

rút gọn :

a,\(\frac{x^5y}{\left(xy^4\right)}\)

b, \(\frac{3\times x^2\times y^5}{9\times x\times y^4}\)

c, \(\frac{\left(3\times x\times y^2\right)^4}{27\times x^5y^3}\)

1.Rút gọn biểu thức:

\(a,\)\(x\times\left(2x^2-3\right)-x^2\left(5x+1\right)+x^2\)

\(b,\)\(3x\times\left(x-2\right)-5x\times\left(1-x\right)-8\times\left(x^2-3\right)\)

\(c,\)\(\left(2x-6\right)\times\left(x+3\right)-5\times\left(2x^2-x+7\right)\)

1)Phân tích đa thức sau thành nhân tử ;

a)\(x^3+\left(a+b+c\right)\times x^2+\left(ab+ac+bc\right)\times x+abc\)

b)\(x\times\left(y^2-z^2\right)+y\left(z^2-x^2\right)-z\left(x^2-y^2\right)\)

Tìm y biết:

\(\left\{\begin{matrix}x\times\left(x-y+z\right)=5\\y\times\left(y-z-x\right)=24\\z\times\left(z+x-y\right)=7\end{matrix}\right.\)

\(2\times\left(x-y\right)\times\left(x+y\right)+\left(x+y\right)^2+\left(x-y\right)\)

Rut gon

\(\left(2\times X-y\right)^5+\left(2\times y-8\right)=0\\ \)