2 log(x+7)+2 log(x+6)+1/2log(x+10)=0

2 log(x+7)+2 log(x+6)+1/2log(x+10)=0

Rumus log:
^2 log a + ^2 log b -^2 log c=^2 log (ab/c)

$^2 log big((x + 7)(x + 6)big) +^{ {2}^{ - 1} }log(x + 10) \ = ^2log(1) \ ^2 log big((x + 7)(x + 6)big) + frac{ - 1}{1}:: ^2 log (x + 10) = ^2 log1 \ ^2 logBigg( frac{(x + 7)(x + 6)}{x + 10} Bigg) = ^2 log(1) \ frac{(x + 7)(x + 6)}{x + 10} = 1 \ {x}^{2} + 13x + 42 = x + 10 \ {x}^{2} + 12x + 32 = 0 \ (x + 8)(x + 4) = 0 \ x = - 8 : : textrm{atau} : : x = - 4$