Question

1)Efetue as operações sindicadas:

A(2x3-3x2+x-1)+(5x3+6x2-7x+3)=

B(-8y2-12y+5)+(7y2-8)=

C(2ax3-5a2x-4by)+(5ax3+7a2x+6by)=

D(a2-b2)+(a2-3b2-c)+(5c-2b2-a2)=

E(3y2-2y-6)-(7y2+8y+5)=

F(8x3-4x2+3x-5)-(6x3-7x2+5x-9)=

Answer 1

A) (2x³ -3x² +x -1) + (5x³+6x² -7x +3) =

2x³ -3x² +x -1 +5x³ +6x² -7x +3 =

2x³ +5x³ -3x² +6x² +x -7x -1 +3 =

7x³ +3x² -6x +2

B) (-8y² -12y +5) + (7y² -8) =

-8y² -12y +5 +7y² -8 =

-8y² +7y² -12y +5 -8 =

-y² -12y -3

C) (2ax³ -5a²x -4by) + (5ax³ +7a²x +6by) =

2ax³ -5a²x -4by + 5ax³ +7a²x +6by =

2ax³ +5ax³ -5a²x +7a²x -4by +6by =

7ax³ +2a² +2by

D) (a² -b²) + (a² -3b² -c) + (5c -2b² -a²) =

a² -b² + a² -3b² -c + 5c -2b² -a² =

a² + a² -a² -b² -3b² -2b² -c +5c =

a² -5b² +4c

E) (3y² -2y -6) - (7y² +8y +5) =

3y² -2y -6 -6y² -8y -5 =

3y² -6y² -2y -8y -6 -5 =

-3y² -10y -11

F) (8x³ -4x² +3x -5) - (6x³ -7x² +5x -9) =

8x³ -4x² +3x -5 -6x³ +7x² -5x +9 =

8x³ -6x³ -4x² +7x² +3x -5x -5 +9 =

2x³ +3x² -2x +4