a-b/b=1/2b=2a-2b3b=2aa=3b/2a²=9b²/4ab=3b²/23a²-5ab+2b²/2a²+3ab-5b²=(27b²/4-15b²/2+2b²)/(18a²/4+9b²/2-5b²)=(5b²/4)/(16b²/4)=5/...