AB=.√18²-9² hasilnya adalah

Mapel: Matematika
Kelas: VIII
Bab: teorema Phytagoras

Jawab
AB = √18²-9²
AB = √324-81
AB = √243
AB = √81 × √3
AB = 9 √3

[tex]ab \: = \: \sqrt{ {18}^{2} - { 9}^{2} } \\ = \sqrt{ {9}^{2} \: \times ( {2}^{2} - 1) } \\ = \sqrt{ {9}^{2} \times (4 - 1)} \\ = \sqrt{ {9}^{2} \times 3} \\ = 9 \sqrt{3} \\ \\ jadi \: ab \: = \: 9 \sqrt{3} [/tex]