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Simplify (a+2b+3c)²-(a-2b-3c)²-6b²-abc

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Simplify (a+2b+3c)²-(a-2b-3c)²-6b²-abc

Posted by Alisha Mariam 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 5 months ago

Simplify (a+2b+3c)^2- (a-2b-3c)^2-6b^2-9bc

(a+2b+3c+a-2b-3c) (a+2b+3c-a+2b+6c) - 3b(2b+3c){a^2-b^2 = (a+b)(a-b)}

= (2a)(2b+6c)-3b(2b+3c)

= 4ab+12ac-3b(2b+3c)

= 4a(b+3c)-3b(2b+3c)

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CBSE > Class 09 > Mathematics