`a)` `15^8``.``2^4`
`=` `15^(2.4)``.``2^4`
`=` `[(15)^2]^4``.``2^4`
`=` `(225)^4``.``2^4`
`=` `(225.2)^4`
`=` `450^4`
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`b)` `27^5:32^3`
`=` `(27^5)/(32^3)`
`=` `((3.3.3)^5)/((2.2.2.2.2)^3)`
`=` `((3^3)^5)/((2^5)^3)`
`=` `(3^15)/(2^15)`
`=` `(3/2)^15`
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a) 15⁸.2⁴
= (15²)⁴.2⁴
= (15.2)⁴
= 30⁴
b) 27⁵ : 32³
= (3³)⁵ : 32³
= (3⁵)³ : (2⁵)³
= [(3/2)⁵]³
= (3/2)¹⁵
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