Ivan Shishkin, Rye (1878)

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Exercice sur les identités remarquables

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Solution

Solution by 2doupi · FR

  1. On utilise (a−b)(a+b)=a2−b2(a-b)(a+b)=a^{2}-b^{2}, 25x2−925x^{2}-9
  2. 4x2+8x+44x^{2}+8x+4
  3. 25x2−10xy+4y225x^{2}-10xy+4y^{2}
  4. 3x2+6x+3+25x2−1=28x2+6x+23x^{2}+6x+3 +25x^{2}-1=28x^{2}+6x+2

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