56x^13
(7x) times (2x^4)^3
let’s focus on the right side.
(2x^4)^3
We need to distribute the ^3 to the 2 and x^4.
(2^3) (x^4)^3
8 (x^4)^3
When an exponent has an exponent, you multiply them.
8 (x^12) ⬅️ we got this by multiplying 4 and 3.
(7x)(8x^12)
When you have multiply exponents, you add the numbers. 7x can also be written as 7x^1.
1+ 12= 13
Multiply 7 and 8.
56x^13