Giải phương trình:
a,\(\left\{{}\begin{matrix}y^3-x^3=7\\2x^3y+3xy^3=16\end{matrix}\right.\)
b,\(\left\{{}\begin{matrix}x^2+5x+y=9\\3x^3+x^2y+2xy+6x^2=18\end{matrix}\right.\)
HEPL ME
giải hệ phương trình \(\left\{{}\begin{matrix}\frac{5}{x-2}-\frac{2y-4}{y-3}=2\\\frac{x+2}{x-2}-\frac{2}{y-3}=4\end{matrix}\right.\)
giải hệ phương trình
\(\left\{{}\begin{matrix}\left(2-x\right)\left(2+y\right)=8\\x\sqrt{4-y^2}+y\sqrt{4-x^2}=4\end{matrix}\right.\)
Giải pt :
\(\left\{{}\begin{matrix}x\sqrt{x^2+y}+y=\sqrt{x^4+x^2}+x\\x+\sqrt{y}+\sqrt{x-1}+\sqrt{y\left(x-1\right)}=\frac{9}{2}\end{matrix}\right.\)
Giải pt :
\(\left\{{}\begin{matrix}2x^2y^2+x^2+2x=2\\2x^2y-x^2y^2+2xy=1\end{matrix}\right.\)
Giải pt :
\(\left\{{}\begin{matrix}6\frac{x}{y}-2=\sqrt{3x-y}+3y\\2\sqrt{3x+\sqrt{3x-y}}=6x+3y-4\end{matrix}\right.\)
\(f\left(x\right)=\left\{{}\begin{matrix}\dfrac{2\sqrt{x+2}-3}{x-1}\\x^2+1\end{matrix}\right.\)
x≥2, x<2
Tính P=f(2)+f(-2)
Giải pt :
\(\left\{{}\begin{matrix}3x^2+2xy+2y^2-3x-2y=0\\5x^2+2xy+5y^2-3x-3y-2=0\end{matrix}\right.\)
Viết gọn lại các kết quả sau :
1) \(\left[\begin{array}{l} \left\{\begin{array}{l} x\geq-2 \\ x< 1 \\ \end{array}\right. \\ x\leq-5 \end{array}\right.\)
2) \(\left\{\begin{array}{l} \left\{\begin{array}{l} x\leq2 \\ x>0 \end{array}\right. \\ \left[\begin{array}{l} x>3 \\ x\leq1 \\ \end{array}\right. \\ \end{array}\right.\)
3) \(\left\{\begin{array}{l} -10<{x}\leq6 \\ -5\leq{x}\leq10 \\ \end{array}\right.\)