Please do 15 no. With process

Please do 15 no. With process (c) 20a- 12b (d) 18a+b sa+4b 4a-3b 14. The coefficient Of a2 in the sum of —5a2 + 8ab, —3a2, 14a2 — I lab is (b) -22 (c) -3 High Order Thinking Skills (HOTS) 15. Fill in the blanks to make the given addition sentence true: 6ab3 + . . + 2b2c + 8abc— 14b3a = 15b2c + .......... + 20abc — 12abc

Please find below the solution to the asked query:

We have : 6 a b³ + ___ + 2 b² c + 8 a b c - 14 b³ a = 15 b² c + ___ + 20 a b c - 12 a b c  , So

6 a b³ + x + 2 b² c + 8 a b c - 14 b³ a = 15 b² c + y + 20 a b c - 12 a b c  ,  Here we assume ' x '  and ' y ' in place of blank .

x + 2 b² c + 8 a b c - 8 a b³  = 15 b² c + y +  8 a b c , Now by comparing both side we get :

x + 2 b² c = 15 b² c ,  As both side will have term that contain " b² c " .

x = 13 b² c ,

And

y  = - 8 a b³ , As both side will have term that contain " a b³ "

Then

6 a b³ + ( 13 b² c ) + 2 b² c + 8 a b c - 14 b³ a = 15 b² c + ( - 8 a b³ ) + 20 a b c - 12 a b c


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