Question

estas subtracoes de polinomios estao corretas?



a) (5x²– 4x + 9) – (8x²– 6x + 3 ) =
5x²-4x+9-8x²+6x-3=
-3x²+2x+6

b) (7x – 4y + 2) – (2x – 2y +5) =
7x-4y+2-2x+2y-5=
5x-2y-3

c) (4x – y – 1) – (9x + y + 3) =
4x-y-1-9x-y-3=
-5x-2y-4

d) (7ab + 4c – 3a) – (5ab + 8c – 10a) =
7ab+4c-3a-5ab-8c+10a=
2ab-4c+7a

e) (x²– 5x + 3) – (4x²+6) =
x²-5x+3-4x²-6=
-3x²-5x-3

Answer 1

Certíssimo Claudia!!!

Answer 2

Sim estão todas certas.