Răspuns: [tex]\red{\underline{\bf a = 0}}[/tex]
Explicație pas cu pas:
[tex]\bf a = \Big[ \big(0,1^{2} +0,2^{2}+0,3^{2}\big):7+8:100\Big]\cdot 10-1,25^{0}[/tex]
[tex]\bf a = \Big[ \big(0,01 +0,04+0,09\big):7+8:100\Big]\cdot 10-1,25^{0}[/tex]
[tex]\bf a = \big(0,14:7+8:100\big)\cdot 10-1[/tex]
[tex]\bf a = \big(0,02+0,08\big)\cdot 10-1[/tex]
[tex]\bf a =0,1\cdot 10-1[/tex]
[tex]\bf a =1-1[/tex]
[tex]\red{\underline{\bf a = 0}}[/tex]
