[tex] \sqrt{ (-2,5)^{2} } = | -2,5 | =2,5[/tex]
[tex] \sqrt{(- \frac{4}{9} )^{2} } = | -\frac{4}{9} | = \frac{4}{9} [/tex]
[tex] \sqrt{(0,01 )^{2} } = | 0,01 | =0,01[/tex]
A= l² => l = √A = √36 = 6 (cm).
Proprietate folosita:
[tex] \sqrt{ x^{2} } = | x | [/tex] (modul de x)
