What is the identity for (a+b+c+d)^2? Can u also give the explanation of derivation of this identity??
vaishnavi , 8 Years ago
Grade 10
Algebra> What is the identity for (a+b+c+d)^2? Can...
1 AnswersVikas TU
Last Activity: 8 Years ago
identity for (a+b+c+d)^2 =
a^2 + b^2 + c^2 + d^2 + 2(a(b+c+d) +b(c+d) + cd)
More identitites apart from this --->
a^3 + b^3 + c^3 = 3abc if a+b+c=0
a^4 + a^2 + 1 = (a^2+1-a) (a^2 +1 +a)
a^4 + a^2 + 1 = (a^2+1-a) (a^2 +1 +a)
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