SALSOUILLE
Answered

(2+4x)au carre
(x-7)aucarre
(8x-2)(8a+2)
(7x+5)(7x-5)
(9-9x)au carre
(10+5x)au carre

Sagot :

CHAOISE
identité remarquable!
(a+b)²=a²+2ab+b²
(a-b)²=a²-2ab+b²
a²-b²=(a-b)(a+b)
WINNER123
Bonjour

(2+4x)² = 4 + 16x + 16x²
(x-7)² = x² - 14x +49
(8x-2)(8a+2) = 64x² -4
(7x+5)(7x-5) = 49x² -25
(9-9x)² = 81 - 162x +81x²
(10+5x)² = 100 + 100x + 25x²