Class 8 Question > Which of the following is obtained by subtrac...

Which of the following is obtained by subtracting x^{2}-y^{2} from y^{2 }- x^{2}?

- a)-2(x
^{2 }- y^{2}) - b)-2(x
^{2 }+ y^{2}) - c)2(x
^{2}+ y^{2}) - d)2(x
^{2}- y^{2})

Correct answer is option 'A'. Can you explain this answer?

Soumalya Mondal
Jan 02, 2021 |

Related
Which of the following is obtained by subtracting x2-y2from y2- x2?a)-2(x2- y2)b)-2(x2+y2)c)2(x2+ y2)d)2(x2- y2)Correct answer is option 'A'. Can you explain this answer?

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Murti
May 20, 2020 |

Expanding

(t+s^{2})(t^{2}-s) = t ((t^{2}-s)+s^{2}(t^{2}-s) = t^{3}-s^{3}+t^{2}s^{2}-ts

(t+s

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