If in a A B C, 2 b^2=a^2+c^2, then 3B B is equal to

Question

Accepted Answer

3 B B = 3 B-4 ^3 B B =3-4 ^2 B =3-4 (1- ^2 B ) =-1+ 4 (a^2+c^2-b^2 )^2 4(a c)^2 =-1+ ( a^2+c^2 2 )^2 (a c)^2 =-1+ (a^2+c^2 )^2 4(a c)^2 =( c^2-a^2 2 a c )^2

Properties of Triangles — Previous Year Questions & Solutions