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(a-2b-3c)2expand

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(a-2b-3c)2expand

Posted by C Anil Kumar 4 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 4 years, 5 months ago

(a−2b−3c)²
According to the equation ,
(a+b+c)²= a²+ b²+ c²+ 2ab + 2bc + 2ca
So we get,
Using the formula we can it write it as
(a−2b−3c)²= a²+(−2b)²+(−3c)²+2a(−2b)+(2(−2b)(−3c)+2(−3c)a
On further calculation we get,
(a−2b−3c)²= a²+ 4b²+ 9c²− 4ab + 12bc − 6ac

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