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

Răspuns :

EagleEyes
(5x-3)(x-2)-(5x-3)(x+9) =
= ( 5x-3)(x-2-(x+9)) =
= (5x-3)(x-2-x-9) =
= (5x-3)(-11) =
= - 11(5x-3) 
Hatty
=(5x-3)(x-2)-(x+9)
=(5x-3)(x-2-x-9)
=(5x-3)(-11)
=-11(5x-3)