Question

solve 17,18,19 only genius full method solve it's urgent I will make u brain list

Answer 1

question 1:-
2(4xsquare -6x +3)+2 (-4xsquare -7x +5)+2 (3x square -8x +6)

8x square -12x +6-8x square -14x+10+6x square -16x +6

-12x -14x+6+10+6x square -16x +6

6x square -42x+22



question 2:-
13xsquare -7y square -(6x square -9y square )

13x square -7y square -6xsquare+9y square

7x square +2y square





question3:-
1.( 7a+7b-c )-(4a-4b-4c)

7a+7b-c-4a+4b+ 4c

3a+11b +3c



2. (8b square-4a square +2ab)-(3a square +4b square -6ab )

8b square -4a+2ab-3a square -4b square +6ab

4b square -7a square +8ab