Question:

SAT MAth qustion please help?

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18(sqrt18) = r(sqrt t) where r and t are positive integers. and r>t. Which could be the value of rt

Please Explain.

a 18

b 36

c 108

d 162

e 324

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  1. c. 108

    18√18 = 18√2*3*3 = 54√2

    54 * 2 = 108


  2. 18(sqrt18)  = 18 √9√2 = 18*3 √2 = 54√2

    so r=54 t= 2

    spo r*t = 54*2 = 108 c
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