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Sagot :

Réponse:

22.Factorisation

a. 25-x²

(5-x) (5-x)

b. x²+2x+1

(x+1)²

(x+1) (x+1)

c. 49x²-100

(7x-10) (7x-10)

d. 4x²-12x +9

(2x-3)²

(2x-3) (2x-3)

e. 16x²-16

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

16(x-1) (x+1)

f. 64-48x+9x²

9x²-48x+64

(3x-8)²

(3x-8)(3x-8)

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