Question

show that the straight lines (A^2-3B^2)x^2 +8ABxy+(b^2-3a^2)Y^2=0 form with the line Ax+By+C=0 an equilateral triangle of area C^2/√ 3(A^2+B^2)

Answer 1

one thing is that all a,b,c's are in upper case while all x's and y's are in lower case and other thing is dat that we can asume 3rd line passing through origin as y=mx