What is the square root of (8 + 2\sqrt15)?

RRB Group-D Model Paper 12 with answers for online practice

Question : 4 of 100

Marks: +1, -0

What is the square root of

(8 + 2√15)

Solution:

Formula used:

(a + b)^2 = a^2 + b^2 + 2ab

Calculation:
Given expression is:

√{8+2√15}

√{5+3+2√5–√3}

√{(5)^2+(3)^2+2√5√3}

√{(√5+√3)^2}

√5+√3

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