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  • 10-03-2017
  • Mathematics
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Evaluate the expression 2ab3 + 6a3 - 4ab2 when a = 2 and b = 4.

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gmany
gmany gmany
  • 25-07-2018

[tex]2ab^3+6a^3-4ab^2[/tex]


Substitute the values of a = 2 and b = 4 to the expression:


[tex] 2\cdot2\cdot4^3+6\cdot2^3-4\cdot2\cdot4^2\\\\=4\cdot64+6\cdot8-8\cdot16\\\\=256+48-128\\\\=176 [/tex]

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