Deixe os cálculos
(3x+5).(x-2)+(3x+5)²=
(3x+5).(x-2)+(3x+5).(3x+5) =
(3x+5)(x-2 +3x+5) =
(3x+5)(4x+3)
==================
3x²-6x+5x-10+(3x+5)(3x+5)
3x ² -x-10+9x²+15x+15x+25
3x²+9x²-29x+15
12x²-29x+15
nao sei se ta certo mas espero ter ajudado algo
Comments
(3x+5).(x-2)+(3x+5)²=
(3x+5).(x-2)+(3x+5).(3x+5) =
(3x+5)(x-2 +3x+5) =
(3x+5)(4x+3)
==================
3x²-6x+5x-10+(3x+5)(3x+5)
3x ² -x-10+9x²+15x+15x+25
3x²+9x²-29x+15
12x²-29x+15
nao sei se ta certo mas espero ter ajudado algo