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Sagot :

AYUDA

bjr

( x - 9 ) ( 5 + 2x ) + ( 3x + 1 ) ( 5 + 2x )

= (5 + 2x) [ (x - 9) + (3x + 1) )]

= (5 + 2x) (x - 9 + 3x + 1)

= (5 + 2x) (4x - 8)

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

Bonjour,

Factoriser :

= (x-9)(5+2x)+(3x+1)(5+2x)

= (5+2x)(x-9+3x+1)

= (5+2x)(4x-9+1)

= (5+2x)(4x-8)

= (5+2x)×4(x-2)

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

Bonne journée.

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