log44 7 x2x 532 0Solutionlog4 4 7x2x5 32 0 log4 4 7x2x5
log_4(4 - 7 x^2/x - 5)-3/2 = 0
Solution
log4{( 4 -7x^2)/(x-5)} - 3/2 =0
log4{( 4 -7x^2)/(x-5)} = 3/2
Using the log property : loga(x) =b ---> x = a^b
( 4 -7x^2)/(x-5) = 4^3/2
(4 -7x^2)/( x-5) = 8
(4-7x^2) = 8( x-5)
4 -7x^2 = 8x -40
-7x^2 -8x +44 =0
On solving the quadratic equation:
x = ( 8 + /- sqrt(64 +44*7) )/-14
x = - 3.14 and x = 2
