Question

Va roggg urgentt!!!DOAR 4 SI 5!!!​

Answer 1

Răspuns:

4. 428 5. a=1, b=169

Explicație pas cu pas:

4.{8+2•[9+9•(7+2•3)]}•2-4•23=

[8+2•(9+9•13)]•2-92=

(8+2•126)•2-92=

260•2-92=

520-92=

=420

5.a=5-4•[5-4•(5-4)]=

a=5-4•1

a=1

b=5+4•[5+4•(5+4)]=

b=5+4•(5+4•9)=

b=5+4•41

b=169

1•169=169=>13•13=169