answer the 2 question
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abhi569:
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So,the given question is 25-a^2-b^2 -2ab
It could be written in 25 -(a^2+b^2+2ab)
Now,we know that a^2+b^2+2ab=(a+b)^2 and 25=5^2
So,the given question could be written in 5^2-(a+b)^2
So,now it is inthe form of a^2-b^2
Now,
5^2 -( a + b )^2
= (5+a+b)(5-a-b)
HPOE THIS MAY HELP YOU
It could be written in 25 -(a^2+b^2+2ab)
Now,we know that a^2+b^2+2ab=(a+b)^2 and 25=5^2
So,the given question could be written in 5^2-(a+b)^2
So,now it is inthe form of a^2-b^2
Now,
5^2 -( a + b )^2
= (5+a+b)(5-a-b)
HPOE THIS MAY HELP YOU
Attachments:

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