Akar dari 98 +akar dari 50 - akar 8 - akar pangkat 72

[tex] \sqrt{98} + \sqrt{50} - \sqrt{8} - \sqrt{72} \\ = \sqrt{49 \times 2} + \sqrt{25 \times 2 } - \sqrt{4 \times 2} - \sqrt{36 \times 2} \\ = 7 \sqrt{2} + 5 \sqrt{2} - 2 \sqrt{2} - 6 \sqrt{2} \\ = 4 \sqrt{2} [/tex]