# Thread: Simplifying Expressions with Integral Exponents

1. ## Simplifying Expressions with Integral Exponents

Hi, Pretty basic question. Can some look at the question I've attached and explain why when I'm simplifying

(2a+1/b)^-2 it changes to (2ab+1/b)^-2

2. Originally Posted by JVP
Hi, Pretty basic question. Can some look at the question I've attached and explain why when I'm simplifying

(2a+1/b)^-2 it changes to (2ab+1/b)^-2

$(2a+\frac{1}{b})^{-2}=(\frac{2ab}{b}+\frac{1}{b})^{-2}$

When you group them into one fraction .

3. How does 2a become 2ab

4. Originally Posted by JVP
How does 2a become 2ab

$2a+\frac{1}{b}=\frac{2a}{1}+\frac{1}{b}=\frac{2a(b )}{1(b)}+\frac{1}{b}$