- #1
sandra2
- 2
- 0
1/2x-7/x-3 Subtract
A rational expression is a mathematical expression that contains a fraction with polynomials (algebraic expressions with multiple terms) in the numerator and denominator. It can also include variables and exponents.
To subtract rational expressions, you must first find a common denominator. Then, you can subtract the numerators and simplify the resulting expression if possible.
Yes, the expression can be simplified by factoring out a 1/x from both terms, resulting in 1/x(1/2x-7). However, if x=0, the expression is undefined.
No, to add or subtract rational expressions, they must have a common denominator. If the denominators are different, you must first find a common denominator before adding or subtracting.
A rational expression is an algebraic expression that contains a fraction, while a rational number is a number that can be expressed as a fraction of two integers. All rational numbers can be written as rational expressions, but not all rational expressions can be simplified to rational numbers.