SOLUTION: ok. I need Some Help. I do good with math. and functions. but this one is comfusing me with the letter. Problem: j(2a) if j(x)= 1-4x^3 i know that im supposed to substitue

Question 203646: ok. I need Some Help. I do good with math. and functions. but this one is comfusing me with the letter.
Problem: j(2a) if j(x)= 1-4x^3
i know that im supposed to substitue the X with 2a but what do i do after that. The (a) is confusing me
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Problem: j(2a) if j(x)= 1-4x^3
i know that im supposed to substitue the X with 2a but what do i do after that. The (a) is confusing me
---------------------
That's what you do, sub 2a for x
j(2a) = 1 - 4(2a)^3
= 1 - 4*8a^3
= 1 - 32a^3
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