Question

Factorise a^2+3b^2+4c^2+2root3ab+4root3bc+4ac

Answer 1

Answer:

A^2+4ab+3b^2

=a^2+4ab+4b^2-b^2

=(a+2b)^2-b^2

=(a+2b+b)(a+2b-b) [a^2-b^2=(a+b)(a-b)]

=(a+3b)(a+b) Answer.