Question

Efectuati:21^2 - 2•{11^2+21 : (2-1) +2 •[1 +2 ^ 3 • (1+2) + 2^4-2^1]}

Answer 1

Răspuns:

Explicație pas cu pas:

21² - 2 × { 11² + 21 : ( 2 - 1 ) + 2 × [ 1 + 1³ × ( 1 + 2 ) + 2⁴ - 2¹]} = 85

= 441 - 2 × [ 121 + 21 : 1 + 2 ×( 1 + 1 × 3 + 16 - 2 ) ] =

= 441 - 2 × [ 121 + 21 + 2 × ( 1 + 3 + 14 ) ] =

= 441 - 2 × ( 142 + 2 × 18 ) =

= 441 - 2 × ( 142 + 36 ) =

= 441 - 2 × 178 =

= 441 - 356 =

= 85