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Sagot :

Réponse :

Explications étape par étape :

1) h(-2) = (-2)^2 - 6(-2) - 7

= 4 + 12 - 7

= 9

2) ( x - 7)(x + 1)

x^2 + x - 7x - 7

x^2 - 6x - 7

3) delta = 36 + 28 = 64

2 solutions

x =(6 - 8)/2 = -2/2 = -1

d' =(6 + 8)/2 = 14/2 = 7

4) (x - 3)^2 - 16

(x - 3 - 4 )( x - 3 + 4)

(x - 7)(x + 1)

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