Question

1. Descompuneți in factori:

g) (x+1) (x-5)+(x+1)
i) (x+5)(x+7)+6(x+7)

Ajutor va rog!

Answer 1

g)  ( x + 1 ) ( x - 5 ) + ( x + 1 ) = ( x + 1 ) ( x - 5 + 1 ) = ( x + 1 ) ( x - 4 )

h)   ( x - 4 ) ( x + 6 ) - 3 ( x - 4 ) = ( x - 4 ) ( x + 6 - 3 ) = ( x - 4 ) ( x + 3 )

i )   ( x + 5 ) ( x + 7 ) + 6 ( x + 7 ) = ( x + 7 ) ( x + 5 + 6 ) = ( x + 7 ) ( x + 11 )