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jmc

algebra intermediate

Problem

Simplify

(2 x)^{4} + (3 x) (x^{3})

.

Solution

We have

(2 x)^{4} + (3 x) (x^{3}) = (2^{4} \cdot x^{4}) + 3 (x^{1 + 3}) = 16 x^{4} + 3 x^{4} = 19 x^{4} .

Final answer

19x^4