given (k—2) is the highest common factor (HCF) of 18,36 and 54. find the value of K
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Step-by-step explanation:
18 = 2×3×3
36 = 2×2×3×3
54 = 2×3×3×3
the common prime factor are 2 and 3
the lowest number of 2 is 2 and 3 is 3²
HCF = 2×3² = 18
given HCF = k-2
18 = k-2
k = 18+2
k= 20
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