add :-
(2x^y -7x^2 +9y^2- 12y^2x)+(3y^2+20x^2y+3x^2-4y^2x)
shrutika5:
answers any body noes
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2x^2y-7x^2+9y^2+12y^2x-3y^2-20x^2y-3x^2+4y^2x
=-18x^2y-8xy^2-10x^2+6y^2
=-18x^2y-8xy^2-10x^2+6y^2
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