Bonsoir, voici ce que je te propose
d= (x-5)²-(2x-7)×(x-5)
= (x²-2×5×x+5²)-(2x×x+2x×(-5)-7×x-7×(-5)
= x²-10x+25-(2x²-10x-7x+35)
=x²-10x+25+2x²+10x+7x-35
= -x²+7x-10
Réponse :
D = (x - 5)² - (2x - 7) × (x - 5)
D = x² - 2 × x × 5 + 5²- (2x² - 10x - 7x + 35)
D = x² - 10x + 25 - (2x² - 17x + 35)
D = x² - 10x + 25 - 2x² + 17x - 35
D = -x² + 7x - 10
En espérant t'avoir aidé, bonne continuation ;)
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Verified answer
Bonsoir, voici ce que je te propose
d= (x-5)²-(2x-7)×(x-5)
= (x²-2×5×x+5²)-(2x×x+2x×(-5)-7×x-7×(-5)
= x²-10x+25-(2x²-10x-7x+35)
=x²-10x+25+2x²+10x+7x-35
= -x²+7x-10
Verified answer
Réponse :
D = (x - 5)² - (2x - 7) × (x - 5)
D = x² - 2 × x × 5 + 5²- (2x² - 10x - 7x + 35)
D = x² - 10x + 25 - (2x² - 17x + 35)
D = x² - 10x + 25 - 2x² + 17x - 35
D = -x² + 7x - 10
En espérant t'avoir aidé, bonne continuation ;)