1.

`A=2x+3xy+7x^(2),B=3x-2y-5x^(2) and C=2xy-6x^(2)-3x`. Find the value of A+B+C.

Answer» Correct Answer - `8x-xy +8x^(2)`
`A+B-c=(2x+3xy+7x^(2))+(3x-2xy-5x^(2))`
`-(2xy-6x^(2)-3x)`
`=(2x+3xy+7x^(2)+3x-2xy-5x^(2)-2xy+6x^(2)+3x)`
`=(2x+3x+3x)+(3xy-2xy-2xy)+7x^(2)-5x^(2)+6x^(2)`
`=8x+(3xy-4xy)+(13x^(2)-5x^(2))`
`8x-1xy+8x^(2)`


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