J’aimerais avoir les réponse pour En utilisant l’identité « (a + b)(c + d) = ac + ad + bc + bd »,
développer
les expressions suivantes :
A = (x + 2)(x – 3) B = (x – 7)(x + 7) C = (2x – 5)(2x + 5)
D = (3 – 4x)(3 + 4x) E = (x² – 3x)(x² + 3x) F = (2x² + 4)(2x² – 4)
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