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Write all identities in class 9th

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Write all identities in class 9th
  • 3 answers

Rajat Singh 4 years, 3 months ago

These are 8 identities which are basic in class 9th.

Rajat Singh 4 years, 3 months ago

4.( a+b )^3 = a^3 +b^3+ 3ab( a+b ) 5.( a-b )^3 = a^3 -b^3 - 3ab(a-b) 6.( a+b+c )^2 = ( a^2+b^2+c^2 )+ 2( ab+ bc+ ca ) 7.( a^3+b^3 )= ( a+b )(a^2+ab+b^2) 8.( a^3-b^3 )= ( a-b)( a^2 +ab+b^2)

Rajat Singh 4 years, 3 months ago

1.( a+b )^2 = a^2+b^2+2ab 2.( a-b )^2 = a^2 + b^2 - 2ab 3.( a^2-b^2 ) = ( a+b )( a-b )
http://mycbseguide.com/examin8/

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