Question

Efetue as seguintes adições de polinômios :
a)- (5x²-4x+7) + (3x²+7x-1)
b)- (6x²-6x+9) + (3x²+7x-1)
c)- (7x-4y+2) + (2x-2y+5)
d)- (4x-y-1) + (9x+y+3)
e)- (-2a²-3a+6) + (-4a²-5a+6)
f)- (4x³-6x²+3x) + (7x³-6x²+8x)
g)- (x²-5x+3) + (4x²+6)
h)- (x²+2xy+y²) + (y²+x²+2xy)
i)- (7ab+4c-3a) + (5c+4a-10)

Answer 1

a)- (5x²-4x+7) + (3x²+7x-1)=
      5x²-4x+7+3x²+7x-1=
      5x²+3x²-4x+7x+7-1=
      8x²+3x+6

b)- (6x²-6x+9) + (3x²+7x-1)=
      6x²-6x+9+3x²+7x-1=
      6x²+3x²-6x+7x+9-1=
      9x²+x+8

c)- (7x-4y+2) + (2x-2y+5)=
      7x-4y+2+2x-2y+5=
      7x+2x-4y-2y+2+5=
      9x-6y+7

d)- (4x-y-1) + (9x+y+3)=
      4x-y-1+9x+y+3=
      4x+9x-y+y-1+3=
      13x+2

e)- (-2a²-3a+6) + (-4a²-5a+6)=
      -2a²-3a+6-4a²-5a+6=
      -2a²-4a²-3a-5a+6+6=
      -6a²-8a+12

f)- (4x³-6x²+3x) + (7x³-6x²+8x)=
     4x³-6x²+3x+7x³-6x²+8x=
     4x³+7x³-6x²-6x²+3x+8x=
     11x³-12x²+11x

g)- (x²-5x+3) + (4x²+6)=
       x²-5x+3+4x²+6=
       x²+4x²-5x+3+6=
       5x²-5x+9

h)- (x²+2xy+y²) + (y²+x²+2xy)=
       x²+2xy+y²+y²+x²+2xy=
       x²+x²+2xy+2xy+y²+y²=
       2x²+4xy+2y²

i)- (7ab+4c-3a) + (5c+4a-10)=
     7ab+4c-3a+5c+4a-10=
     7ab+4c+5c-3a+4a-10=
     7ab+9c+a-10