Odpowiedź:
[tex] \sqrt{98} = \sqrt{7 {}^{2} } \times 2 = \sqrt{7 {}^{2} } \sqrt{2} = 7 \sqrt{2} [/tex]
[tex] \sqrt{175} = \sqrt{5 {}^{2} } \times 7 = \sqrt{5 {}^{2} } \sqrt{7} = 5 \sqrt{7} [/tex]
[tex] \sqrt{99} = \sqrt{3 {}^{2} } \times 11 = \sqrt{3 {}^{2} } \sqrt{11 } = 3 \sqrt{11} [/tex]