Factorisation 1.(10x + 7)×(9x + 2) + 10x + 7 2.(8x - 1) × (8x - 6) + 8x - 1
Mathématiques
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Question
Factorisation
1.(10x + 7)×(9x + 2) + 10x + 7
2.(8x - 1) × (8x - 6) + 8x - 1
1.(10x + 7)×(9x + 2) + 10x + 7
2.(8x - 1) × (8x - 6) + 8x - 1
1 Réponse
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1. Réponse Vins
bonsoir
( 10 x + 7 ) ( 9 x + 2 ) + 1 ( 10 x + 7 )
= ( 10 x + 7 ) ( 9 x + 2 + 1 )
= ( 10 x + 7 ) ( 9 x + 3 )
= 3 ( 10 x + 7 ) ( 3 x + 1 )
( 8 x - 1 ) ( 8 x - 6 ) + 1 ( 8 x - 1 )
= ( 8 x - 1 ) ( 8 x - 6 + 1 )
= ( 8 x - 1 ) ( 8 x - 5 )