Sagot :
Bonsoir
1) ( x+8 au carré )= x² + 16x +64
2) (x-5au carré) =x² - 10x +25
3) (x+7) (x-7)= x² - 49
4) (5x+9 au carré)= 25x² +90x +81
5) (3x-5au carré )= 9x² - 30x +25
6) (8x+7)(8x-7)= 64x² -49
1) ( x+8 au carré )= x² + 16x +64
2) (x-5au carré) =x² - 10x +25
3) (x+7) (x-7)= x² - 49
4) (5x+9 au carré)= 25x² +90x +81
5) (3x-5au carré )= 9x² - 30x +25
6) (8x+7)(8x-7)= 64x² -49
1) ( x+8)²
=x²+16x+64
2) (x-5)²
=x²-10x+25
3) (x+7) (x-7)
=x²-49
4) (5x+9)²
=25x²+90x+81
5) (3x-5)²
=9x²-30x+25
6) (8x+7)(8x-7)
=64x²-49
=x²+16x+64
2) (x-5)²
=x²-10x+25
3) (x+7) (x-7)
=x²-49
4) (5x+9)²
=25x²+90x+81
5) (3x-5)²
=9x²-30x+25
6) (8x+7)(8x-7)
=64x²-49