Equazioni con prodotti notevoli

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Across
  1. 2. (-2a(3a-2)-a)(-2a^2)-(-2a^3)(3a-1)-2a(9a^3)
  2. 3. -4x(2x+3y)-3y(-4x+y)-2(4x^2+3y^2)
  3. 5. -1/6(2a-3x)
  4. 7. a(x+a)
Down
  1. 1. x^2(x+y-1)-x(x-y)-y(x^2-2)-xy
  2. 4. 3(1/9x^2-2x)
  3. 6. -2/3a^2(-2/3a+3/2)-(5a^2+5/2a)(-2/5a)
  4. 8. (x-3)(x+3)