Question

expand the following expressions (  3√5 )² i am going to award the best answer to them who tells me the first and correct 

Answer 1

(3√5)² = (3√5)x(3√5) = (3x3) x (√5x√5) = 9x5 = 45

Answer 2

$(3 \sqrt{5} )^2=(3 \sqrt{5} )(3 \sqrt{5} )=9( \sqrt{5} )^2=9(5)=45$