How do you subtract #\frac { 7x } { 4} - \frac { 3x } { 5}#?
Create a common denominator for both fractions so that they can be subtracted.
Now that both terms have the same denominator the terms can be subtracted.
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In order to add or subtract fractions, they must have the same denominator, called the least common denominator (LCD). To find the least common denominator, write the multiples for each denominator. The lowest (least) multiple in common is the LCD.
Multiply.
Simplify.
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To subtract , find a common denominator, which is the least common multiple (LCM) of 4 and 5, which is 20. Then, rewrite each fraction with the common denominator.
becomes , and becomes .
Now, subtract the numerators and keep the common denominator:
.
So, .
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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