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Sagot :

MAUDMARINE

Bonjour

Dans chaque cas, factoriser.

a) y² - 10y + 25  = (y - 5)²

b) y² + 10y + 25  = (y + 5)²

c) y² - 49  = (y - 7) (y + 7)

d) 4x² - 36  = 4 (x - 3) (x + 3)

e) 36x² - 12x + 1  = (6x - 1)²

f) 20 - 5x² = - 5 (x - 2) (x + 2).

INEQUATION

Bonjour,

Factoriser.

a) y² - 10y + 25 = (y-5)(y-5)= (y-5)²

b) y² + 10y + 25 = (y+5)(y+5)= (y+5)²

c) y² - 49= (y-7)(y+7)

d) 4x² - 36 = (2x-6)(2x+6) ou encore 2*2(x-3)(x+3)= 4(x-3)(x+3)

e) 36x² - 12x + 1 = (6x-1)(6x-1)= (6x-1)²

f) 20 - 5x² <=> (-5x²+20)=  -5(x-2)(x+2)

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