Question

question given in attachment... please give detailed answer​

Answer 1

Answer :-

${ \sf{ \color{blue}{(a) :}}} \: - 23x + 7y \: from \: 20x - 3y \\ \\ \implies(20x - 3y) - ( - 23x + 7y) \\ \implies20x - 3y + 23x - 7y \\ \implies43x \: - 4y \\ \\ { \sf{ \color{blue}{ (b):}}} - 19 {x}^{2} + 20x - 3 \: from \: { - 20x}^{2} - 30x + 5 \\ \\ \implies (- 20 {x}^{2} - 30x + 5) - ({19x}^{2} + 20x - 3) \\ \implies { - 20x}^{2} - 30x - 5 - {19x}^{2} - 20x + 3 \\ \implies { - 39x}^{2} - 50x - 2$

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