alassen
Simplify the expression: √108 + √27



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alassen
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Choices:
A. 3√15
B. 3i√15
C. 9i√3
D. 9√3

cwrw238
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look for perfect squares in the factors of each number
eg √27 = √3 * √9 = 3i √3
now do a similar process with √128

alassen
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biggest perfect square in 128 is 16

touseii45
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dw:1365030037227:dw

cwrw238
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√108 = √4 * √27i = 6i √3
so adding them gives 9i √3

alassen
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Thank You

cwrw238
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C is correct option

cwrw238
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sorry i wrote 128 instead of 108