ADDING AND SUBTRACTING RATIONAL EXPRESSIONS WITH UNLIKE DENOMINATOR

Problem 1 :

Solution :

The denominators are almost same, using the negative sign in the middle, we get

Problem 2 :

Solution :

(a-4) and (4-a) both are almost same.

By factoring the negative sign from (4-a), we get -(4-a).

Problem 3 :

Solution :

Since the denominators are not the same, we are using cross multiplication.

Problem 4 :

Solution :

Since the denominators are not the same, we are using the cross multiplication.

Problem 5 :

Solution :

Since the denominators are not the same, we are taking the common factor of 2b + 6, we get

Problem 6 :

Solution :

Problem 7 :

Solution :

Problem 8 :

Solution :

Problem 9 :

Solution :

Since the denominators are not the same, we are using the least common multiple.

Problem 10 :

Solution :

By factoring the denominators, we get

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