GMATPrep Algebra: If $a \gt 0$, $b \gt 0$, and $c \gt 0$, is $a(b-c)…$ GMATPrep Algebra: If $a \gt 0$, $b \gt 0$, and $c \gt 0$, is $a(b-c)…$ Sign Up for a comprehensive online GMAT quantitative course.