# GRE Math : How to subtract rational expressions with different denominators

## Example Questions

### Example Question #10 : Rational Expressions

Choose the answer which best simplifies the following expression:

Explanation:

To simplify this expression, first multiply both terms by the denominator of the other over itself:

Now that you have a common denominator, you may subtract:

### Example Question #1 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the following expression:

Explanation:

To simplify this problem, multiply each term by the denominator of the other over itself:

Now that both terms share a denominator, you can subtract:

### Example Question #291 : Algebra

Choose the answer which best simplifies the following expression:

Explanation:

To solve this problem, first multiply each term of the original expression by the denomenator of the other over itself:

Then you will have two terms with a common denomenator:

### Example Question #1 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the expression below:

Explanation:

To simplify this problem, multiply each term by the denomenator of the other over itself:

Then you will yield terms with a like denomenator, which can be combined:

### Example Question #291 : Gre Quantitative Reasoning

Choose the answer which best simplifies the expression below:

Explanation:

To simplify the expression, first multiply each term by the denomenator of the other over itself:

Then you yield terms with common denomenators, which can be combined:

### Example Question #5 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the following expression:

Explanation:

To simplify, first multiply each of the terms by the denomenator of the other over itself:

Then you will get terms with a common denomenator, which can be combined:

### Example Question #11 : Expressions

Choose the answer which best simplifies the expression below:

Explanation:

To simplify, first multiply each of the terms by the denomenator of the other over itself:

You will yield terms with a common denomenator, which can be combined:

### Example Question #7 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the expression below: