Solve this:-
1.  Find the sum of
a )     3 a 2 - 6 a 2 - 4 a 2 ,   7 a 2 b )     7 a b ,   8 a b ,   - 10 a b ,   - 5 a b c )     6 x 2 y ,   - 8 x 2 y ,   - 4 x 2 y ,   3 x 2 y

Dear Student,

(a)3a2-6a2-4a2-7a2=(3-6-4-7)a2=-14a2(b)7ab+8ab-10ab-5ab=(7+8-10-5)ab=0(c)6x2y-8x2y-4x2y+3x2y=(6-8-4+3)x2y=-3x2y
Regards

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