I need to solve it and show all the steps

Answer:
First Step: What two multiples have perfects squares that equal 48 and 12? P.S They also need to have a common multiple so you can combine like terms in the end.
16*3=48
4*3=12
Second Step: Now use those multiples to split up your square roots so you will have perfect squares.
2√48 + 2√12=
2√16 ×√3 + 2√4×√3= Now Simplify!
2×4×√3 + 2×2×√3= Multiply!
8√3 + 4√3
Third Step: Now that they look alike you can just add them.
Answer: 12√3
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Step-by-step explanation: