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Someone please help me : evaluate 3st to the second power + 2s if s=5 and t=3??

Someone please help me : evaluate 3st to the second power + 2s if s=5 and t=3??
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Someone please help me : evaluate 3st to the second power + 2s if s=5 and t=3??

User RoyalBingBong
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s=5\ \ \ and\ \ \ t=3\\\\\Rightarrow\ \ \ 3st^2 + 2s=3\cdot 5\cdot3^2+2\cdot5=15\cdot9+10=135+10=145
User MLyck
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