![]() ![]() We are often trying to find the Least Common Denominator (LCD). If we can make them the same then all we need to do is subtract or add the values of the numerator. We then want to try to make the denominators the same. The first thing we need to do is spot like terms and if we cannot spot them, we can often reduce the terms to create like terms. When we need to calculate a sum or difference between two rationale expressions. These are expressions that can often be written as a quotient of two polynomials. Similar is the case for adding and subtracting rational algebraic expressions. It just means you have to learn a bit more. However, complications do not mean they get difficult. How to Add and Subtract Rational ExpressionsĪlgebra becomes more complicated as we start to make further progressions that require us to combine or evaluate multiple expressions in the same system.
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