Enter the correct answer in the box. Write the sum of 7 \sqrt[]{28x^6} + 4\sqrt[]{7x^6} in simplest form, if x ≠ 0.

Question

Enter the correct answer in the box. Write the sum of
`7 \sqrt[]{28x^6} + 4\sqrt[]{7x^6}` in simplest form, if x ≠ 0.

Answer 1

18x^3sqrt(7)

Explanation:

14x^3sqrt(7)+4x^3sqrt(7); factor our 4 in the first radical and factor out x^6 in both radicals

Add like terms;

18x^3sqrt(7).