√20 + 4√5 =...
A. 13√5
B. 10√5
C.9√5
D. 6√5
E. 5√5
CEPETAN
A. 13√5
B. 10√5
C.9√5
D. 6√5
E. 5√5
CEPETAN
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[tex] \sqrt{20} + 4 \sqrt{5} \\ \sqrt{4 \times 5} + 4 \sqrt{5} \\ 2 \sqrt{5} + 4 \sqrt{5} \\ (2 + 4) \sqrt{5} \\ 6 \sqrt{5} \: (D)[/tex]