expand (2a-3b-4c)^2
solve it plz its urgent
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Answer:
4a²+ 9b² + 16c² - 12ab + 24bc - 16ac
Step-by-step explanation:
as we know that according to algabraic identities,
(a-b-c )² = a²+b²+c² - (2 x a x b )+ (2 x b x c) - (2 x a x c)
then,
= (2a)²+(3b)²+(4c)² - (2 x 2a x 3b) + (2 x 3b x 4c) - (2x 2a x 4c)
= 4a²+ 9b²+16c²-12ab+24bc-16ac
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