Question

log x + log (x-3) = log 10

Answer 1

Logx+log(x+3)=log10
solve for x:
log(x*(x+3))=log10
x^2+3x=10
x^2+3x-10=0
(x+5)(x-2)=0
x=-5(reject, x>0)
or
x=2