Hasil dari √80-√20+√45= Pake caranya yaa.. terimakasih

disederhanakan dahulu

=√80-√20+√45
=√4×4×5-√4×5+√9×5
=2×2√5-2√5+3√5
=4√5+1√5
=5√5

Jawaban B.

[tex] \sqrt{80} - \sqrt{20} + \sqrt{45} \\ = \sqrt{16 \times 5} - \sqrt{4 \times 5} + \sqrt{9 \times 5} \\ = 4 \sqrt{5} - 2 \sqrt{5} + 3 \sqrt{5} \\ = (4 - 2 + 3) \sqrt{5} \\ = 5 \sqrt{5} [/tex]