Answer:
[tex]13 \sqrt{5} [/tex]
Step-by-step explanation:
[tex] \sqrt{5} + 6 \sqrt{20} [/tex]
[tex] \sqrt{5} + 6 \sqrt{2 {}^{2} \times 5 } [/tex] (prime factors)
[tex] \sqrt{5} + 12 \sqrt{5} [/tex]
