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Sagot :

Bonsoir,

x² -4x +x -4 + x² -x +3x -3

= 2x²  -x -7

x² +2x +1 -( x² -5x +3x -15)

= x² +2x +1 - x² +5x -3x +15

= 4x+16

J'ai zappé 1, excuse-moi

NAPSAZZ13

Réponse:

Bonjour

Explications étape par étape:

(x+1)(x-4) + (x+3)(x-1)

= x² -4x +1x -4 + x² -1x +3x -3

= 2x² -x -7

(x+1)² - (x+3)(x-5)

= (x² + 2×x×1 + 1²) - x² -5x +3x -15

= x² +2x +1 -x² +2x +15

= 4x +16

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