Question

1)(5b)² +15/5b² +3= 2)(5a²)³ × (6b)² / (30a³b)²=

Answer 1

1)
$(5b) {}^{2} + \frac{15 {}^{2} }{5b} + 3 = \frac{25b + {}^{3 } +3b + 45 }{b}$
2)
$(5a {}^{2} ) {}^{3} \times \frac{(6b) {}^{2} }{(30a {}^{3}b) {}^{2} } = 125 \times \frac{1}{25} = 5 \times 1 = 5$