expand (2a - 3b +4c)^2
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30
Using the formula, (a+b+c)^2 = a^2+b^2+c^2+2ab+2bc+2ca
(2a+3b+4c)^2 = (2a)^2+(3b)^2+(4c)^2+2(2a*3b)+2(3b*4c)+2(4c*2a)
(2a+3b+4c)^2 = 4a^2+9b^2+16c^2+12ab+24bc+16ca
(2a+3b+4c)^2 = (2a)^2+(3b)^2+(4c)^2+2(2a*3b)+2(3b*4c)+2(4c*2a)
(2a+3b+4c)^2 = 4a^2+9b^2+16c^2+12ab+24bc+16ca
jagadishwararoa:
my question is( 2a- 3b + 4c ) ^2
The answer is incorrect
Answered by
16
(a+b+c)² = a²+b²+c²+2ab+2bc+2ca
4a²+9b²+16c²-12ab-24bc+16ca
4a²+9b²+16c²-12ab-24bc+16ca
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