Answer:
17
Explanation:
using the rule of radicals
⇔ ×
simplifying the given radicals
=
= ×
= 3
-----------------
= 2
------------------
Then
5 + 3 - 4
= 5(3) + 3(2) - 4
= 15 + 6 - 4 ← collect like radicals
= 21 - 4
= 17
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