22. a) (10 - x)² b) (x + 9) (x - 9) c) (10 + x)² d) (7 + 8x)²
Mathématiques
amandineamandine
Question
22.
a) (10 - x)²
b) (x + 9) (x - 9)
c) (10 + x)²
d) (7 + 8x)²
a) (10 - x)²
b) (x + 9) (x - 9)
c) (10 + x)²
d) (7 + 8x)²
2 Réponse
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1. Réponse winner123
bonjour
a ) 100 - 20 x + x²
b = x² - 81
c = 100 + 20 x + x²
d = 49 + 102 x + 64 x²
révise les identités -
2. Réponse nonotata
a) (10 - x)² = 100 -20x +x² = x²-20x+100
b) (x + 9) (x - 9) = x² -81
c) (10 + x)² = 100 +20x +x² =x²+20x+100
d) (7 + 8x)² = 49 +112x + 64x² = 64x²+112x+49