Olá, tudo bem? O meu nome é Blues! E hoje irei te ajudar. Pode-me perguntar nos comentários se tiver alguma dúvida ;) .
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→ Devemos subtrair os coeficientes dos termos de mesmo grau, isto é, os termos semelhantes.
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a) ( 5x² – 7x + 5 ) – ( 2x² + 7x – 3 ) =
5x² – 7x + 5 – 2x² – 7x + 3 =
3x² – 14x + 8 =
3x² – 2x – 12x + 8 =
x . ( 3x – 2 ) – 4( 3x – 2 ) =
( 3x – 2 ) . ( x – 4 )
b) ( 8x³ – 5x² – 3 ) – ( 9x – 6x³ ) =
8x² – 5x² – 3 – 9x + 6x³ =
14x³ – 5x² – 9x – 3
c) ( 6m – 3n + 2p ) – ( 3m – 3n + 5p ) =
6m – 3n + 2p – 3m + 3n – 5p =
6m + 2p – 3n – 5p =
3m + 2p – 5p =
3m – 3n
d) ( t² – t – 3 ) – ( – t² + t + 3 ) =
t² – t – 3 + t² – t – 3 =
2t² – t – 3 – t – 3 =
2t² – 2t – 3 – 3 =
2t² – 2t – 6
e) ( 7ab + 2c – 3a ) – ( 5ab – 4a + c ) =
7ab + 2c – 3a – 5ab + 4a – c =
2ab + 2a – 3a + 4a – c =
2ab + c + 4a =
2ab + c + a
⇒ Atenciosamente.
— Blues 04|09|21 às 11:44
