Réponse :
Explications étape par étape
Bonjour
5^(-2) = 1/(5^2) = 1/25
2) 0,000 000 8 = 8 x 10^(-7)
3) (x - 5)^2 = x^2 - 10x + 25
4) y^2 - 9 = y^2 - 3^2 = (y - 3)(y + 3)
5) factorisation de (x - 1)(x + 3) + 3(x - 1)
= (x - 1)(x + 3 + 3)
= (x - 1)(x + 6)
6) V(4 + 9) = V13
7) 2(x - 1)(x + 3) = (2x - 2)(x + 3)
8) 1 est solution de : x^3 - 5x^2 + 3x + 1 = 0
1^3 - 5 * 1^2 + 3 * 1 + 1 = 1 - 5 + 3 + 1 = 5 - 5 = 0
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Réponse :
Explications étape par étape
Bonjour
5^(-2) = 1/(5^2) = 1/25
2) 0,000 000 8 = 8 x 10^(-7)
3) (x - 5)^2 = x^2 - 10x + 25
4) y^2 - 9 = y^2 - 3^2 = (y - 3)(y + 3)
5) factorisation de (x - 1)(x + 3) + 3(x - 1)
= (x - 1)(x + 3 + 3)
= (x - 1)(x + 6)
6) V(4 + 9) = V13
7) 2(x - 1)(x + 3) = (2x - 2)(x + 3)
8) 1 est solution de : x^3 - 5x^2 + 3x + 1 = 0
1^3 - 5 * 1^2 + 3 * 1 + 1 = 1 - 5 + 3 + 1 = 5 - 5 = 0