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b=5la puterea a 4 -(2*11)la puterea 2 -11 la a 2


Răspuns :

B=5⁴ -(2*11)²-11²=
=
5⁴ -11² *(2²+1)=
=5⁴ -11² *5=
=5(5³-11²)
=5(125-121)=
=5*4=20
C05E
b=5⁴-(2×11)²-11²=
b=5⁴-2²×11²-11²=
b=625-4×121-121=
b=625-484-121=
b=141-121
b=20