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Sagot :

NATH14

Pour l'exercice 104 :

a) (x-3)² = (x-3) x (x-3) = x² - 3x - 3x + 9 = x² - 6x² + 9

 

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JESUISEN3E

exercice 104

 

a. (x-3)²

  =x²-2x3xx+3²

  =x²-6x+9

b. (5+3x)²

  =5²+3xx2x5+3x²

  =25+30x+9x²

c. (4-x)(4+x)

  =4²-x²

 

exercice105

 

a.= x²+6x+9

  =(x+3)²

b.=y²-8y²+16

  = (y-4)²

c.=64x²-100

  = (64x-100)(64x+100)

d.=1-16y²

  =(1-16y)(1+16y)

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