Răspuns :
[tex]2 \sqrt{63} = \sqrt{ {2}^{2} \times 63 } = \sqrt{4 \times 63} = \sqrt{252} [/tex]
[tex] | \sqrt{252} - \sqrt{252} | = |0| = 0[/tex]
[tex]2 \sqrt{63} = \sqrt{ {2}^{2} \times 63 } = \sqrt{4 \times 63} = \sqrt{252} [/tex]
[tex] | \sqrt{252} - \sqrt{252} | = |0| = 0[/tex]