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(a+b)2 =a2 + b2 + 2ab …

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(a+b)2 =a2 + b2 + 2ab prove this identity?

Posted by Khushi Joshi 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Arpita Banerjee 8 years, 7 months ago

(a+b)²

= (a+b) (a+b)

=a(a+b) + b(a+b)

=a² +ab +ab +b²

=a² + 2ab +b² = a² +b² + 2ab

Therefore,(a+b)²=a² +b² + 2ab

1Thank You

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CBSE > Class 09 > Mathematics