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Sagot :

Bonjour,

a)

x

x(5x+3 +2x+7)=

x( 7x +10) =

7x² +10x

b)

100

100 ( 13x-8 -7x +4)=

100 ( 6x -4)=

600x -400

c)

(x+3)

(x+3) ( 2x-1 +8x+5) =

(x+3)(10x +4)=

10x² +4x +30x +12 = 10x² +34x +12

d)

(3x-4)

(3x-4) ( 5x -9x +1) =

(3x-4) ( -4x +1)=

-12x² +3x +16x -4=

-12x² +19x -4

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