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Sagot :

Bonjour,

A = x²-2x  = x( x-2)

B=5+5x = 5(1+x)

C=(2x+7)(x-4)+5x(x-4)

= (x-4) ( 2x+7 +5x) = (x-4) ( 7x+7 )

D=(3x+1)²+(2x-3)(3x+1)

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

(3x+1 ( 5x -2)

bonjour

A=x²-2x (facteur commun x)

=x(x-2)

B=5+5x (facteur commun 5)

=5(1+x)

C=(2x+7)(x-4)+5x(x-4) (facteur commun(x-4))

=(x-4)(2x+7+5x)

=(x-4)(7x+7)

=7(x+1)(x-4)

D=(3x+1)²+(2x-3)(3x+1) (facteur commun(3x+1))

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

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

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

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