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(-3j²k³)²(2j²k)³ = When a power is raised to a power the exponents have to be multiplied.

= (-3²j⁽²*²⁾k⁽³*²⁾)(2³j⁽²*³⁾k³) = We can take out the constants

= (9)(8)(j⁴k⁶)(j⁶k³) = We can group the same variables

= 72(j⁴j⁶)(k⁶k³) = When multiplying two powers that have the same base, you have to add the exponents.

= 72 j⁽⁴⁺⁶⁾k⁽⁶⁺³⁾ = 72j¹⁰k⁹

Answer = 72j¹⁰k⁹

Hope this helps!

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step-by-step explanatio89