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bonjour pouvez vous factoriser l’expression : (-7-x)carré+(-1-9x)(-x-7)

Sagot :

SKABETIX

Bonjour,

(-7 - x)² + (-1 - 9x)(-x - 7)

= (-x - 7)² + (-9x - 1)(-x - 7)

= (-x - 7)(-x - 7) + (-9x - 1)(-x - 7)

= (-x - 7)(-x - 7 - 9x - 1)

= (-x - 7)(-10x - 8)

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