Q9 of 227 Page 90

Find the LCM of the following

(x + 4)2 (x – 3)3, (x – 1)(x + 4)(x – 3)2

Given terms: –


(x + 4)2 (x – 3)3, (x – 1)(x + 4)(x – 3)2


Formula used: –


LCM = Least Common Multiple


Means it is the lowest term by which every element must be divided completely;


(x + 4)2 (x – 3)3 = (x + 4) × (x + 4) × (x – 3) × (x – 3) × (x – 3)


(x – 1)(x + 4)(x – 3)2 = (x – 1) × (x + 4) × (x – 3) × (x – 3)


first find the common factors in all terms


Common factor = (x + 4) × (x – 3) × (x – 3)


then multiply the remaining factors of terms in common


factor to get the LCM


= (x + 4)(x – 3)(x – 3) × [(x + 4) × (x – 3) × (x – 1)]


= (x + 4)2 (x – 3)3(x – 1)


Conclusion: –


The LCM of given terms [(x + 4)2 (x – 3)3, (x – 1)(x + 4)(x – 3)2] is


(x + 4)2 (x – 3)3(x – 1)


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