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(2,5 :1 supra 4 - 1) la puterea a2a urgent ​

25 1 Supra 4 1 La Puterea A2a Urgent class=

Răspuns :

2,5=25/10= 5/2

(5/2:1/4-1)^2= (5/2×4-1)^2= (10-1)^2= 9^2= 81

(2,5:1/4-1)²=

=(25/10:1/4-1)²=

=(5/2:1/4-1)²=

=(5/2×4-1)²=

=(5×2-1)²=

=(10-1)²=

=9²=81