Question

verify (a+b+c)2=a2+b2+c2+2ab+2bc+2ca​

Answer 1

detailed explanation is shown above

Answer 2

Answer:

$(a + b + c)^{2} = (a + b + c)(a + b + c)$

$= a(a + b + c) + b(a + b + c) +$

$c(a + b + c) \: = {a}^{2} + ab + ac +$

${b}^{2} + ab + bc + ac + bc + {c}^{2} =$

${a}^{2} +b^{2} + {c}^{2} + 2ab + 2bc + 2ca$

Hope it helps you.