Matematika 12

Greg Attwood, Jack Barraclough, Ian Bettison, Alistair Macpherson, Bronwen Moran, Su Nicholson, Diane Oliver, Joe Petran, Keith Bledger, Harry Smith, Geoff Staley, Robert Ward-Penny dhe Dave Wilkins

Pyetja

Zgjidh sistemet e ekuacioneve.

  1. {x+y=11xy=30\begin{cases} x+y=11 \\ xy=30 \end{cases}
  2. {2x+y=1x2+y2=1\begin{cases} 2x+y=1 \\ x^2+y^2=1 \end{cases}
  3. {y=3x2y2xy=15\begin{cases} y=3x \\ 2y^2-xy=15 \end{cases}
  4. {3a+b=83a2+b2=28\begin{cases} 3a+b=8 \\ 3a^2+b^2=28 \end{cases}
  5. {2u+v=7uv=6\begin{cases} 2u+v=7 \\ uv=6 \end{cases}
  6. {3x+2y=7x2+y=8\begin{cases} 3x+2y=7 \\ x^2+y=8 \end{cases}