Bonjour, j'ai quelques difficutés à résoudre ces exercices , merci de m'aider:
x²+2x ...x...+16= (...+...)²
49x²-2 x...x...+...=(...-9)²
x²-...=(...+7)(...-...)

9x²+2x...x...+...=(...+4)²
...- 64= (...+...)(3x-...)
(2x+...)²=...+24x+....
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