Rozwiąż
57 - 40 p(2) = ( 5 - 4 p(2))^2
57 + 40 p(2) = ( 5 + 4 p(2))^2
57 - 40 p(2) > 0 i 57 + 40 p(2) > 0
zatem
p [ 57 - 40 p(2)] - p[ 57 + 40 p(2)] =
= I 5 - 4 p(2) I - I 5 + 4 p(2) I =
= 4 p(2)- 5 - ( 5 + 4 p(2)) = - 10
=============================
gdzie
p(2) - pierwiastek kwadratowy z 2
p [ ... ] - pierwiastek kwadratowy z [ ... ]
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57 - 40 p(2) = ( 5 - 4 p(2))^2
57 + 40 p(2) = ( 5 + 4 p(2))^2
57 - 40 p(2) > 0 i 57 + 40 p(2) > 0
zatem
p [ 57 - 40 p(2)] - p[ 57 + 40 p(2)] =
= I 5 - 4 p(2) I - I 5 + 4 p(2) I =
= 4 p(2)- 5 - ( 5 + 4 p(2)) = - 10
=============================
gdzie
p(2) - pierwiastek kwadratowy z 2
p [ ... ] - pierwiastek kwadratowy z [ ... ]