Răspuns:
[tex] \sqrt{7 ^{2} \times 11} = \sqrt{49 \times 11 } = \sqrt{539} \\ - \sqrt{11^{2} \times 19 } = - \sqrt{121 \times 19} = - \sqrt{2299} \\ \\ - \sqrt{ { \frac{2^{2} }{3^2} \times 35 } } = - \sqrt{ \frac{4}{9} \times 35} = - \sqrt{ \frac{140}{9} } \\ \\ \sqrt{(0.3)^{2} \times 120 } = \sqrt{0.09 \times 120} = \sqrt{10.8} [/tex]
