add:
(3x^2-4xy+y^2)+-8x^2-9xy-y^2)+(x^2+xy-2y^2)

Question

anonymous · Answer

Sry the 8x^2 should have a parenthesis around it also

amistre64 · Answer

line them up its easier:

  3x^2 -4xy +1y^2
-8x^2 -9xy  -1y^2
  1x^2 +1xy -2y^2
-----------------
 -4x^2 -12xy -2y^2

anonymous · Answer

what happened to the x^2 and xy where did they go, I'm not understanding that part

amistre64 · Answer

-4x^2 -12xy -2y^2
^^^^    ^^^^

i dont quite understand your response

anonymous · Answer

in the last part of the equation where did the x go

anonymous · Answer

i thought you where supposed to do what was in each bracket and then add those together

amistre64 · Answer

$3x^2$ $ -4xy$  $ +1y^2 $
$-8x^2$  $ -9xy$  $ -1y^2 $
   $1x^2$  $ +1xy$  $ -2y^2 $
----------------- 
$-4x^2$  $ -12xy $  $-2y^2$

amistre64 · Answer

the brackets are as used up as they can get; there is nothing to do inside of them

anonymous · Answer

ok i put this question in last night and got the answer you gave me but they said the 4x^2 was positive not negative.

amistre64 · Answer

3+1-8 = -4

4-8 = -4

-4 = -4

anonymous · Answer

k

amistre64 · Answer

amistre64 · Answer