EXERCICE 7. Développer et réduire les expressions suivantes.
1. (x+4)(x+4)
3. (7x)(7 + x)
2. (3x - 5)(3x - 5)
4.
(a+b)(a + b)
5. (a - b)(a - b)
6. (a - b)(a+b)
1. (x+4)(x+4)
3. (7x)(7 + x)
2. (3x - 5)(3x - 5)
4.
(a+b)(a + b)
5. (a - b)(a - b)
6. (a - b)(a+b)
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bonjour;
1. (x+4)(x+4)
= x² +4x +4x +16
= x² +8x +46
3. (7+x)(7 + x)
= 49 +7x +7x +x²
= x² +14x +49
2. (3x - 5)(3x - 5)
= 9x² -15x -15x +25
= 9x² - 30x +25
4.
(a+b)(a + b)
= a² +ab+ab+b²
= a² +b² +2ab
5. (a - b)(a - b)
= a² +ab -ab -b²
= a² -b²
6. (a - b)(a+b)
= a² +ab -ab -b²
= a² -b²