Question

Using k method of solving proportions ( a/b = c/d = e/f ) prove that
$(b^{2} + d^{2} + f^{2} )( a^{2} + c^{2} + e^{2} ) = ( ab + cd + ef) ^{2}$

Help is much appreciated
(p.s Tomorrow is my test so answer required ASAP PLZ )
Thanks

Answer 1

this is the answer of ur question