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(2-t-2)²+(2-1)²≤2
t²+1≤2
t²-1≤0
(t-1)(t+1)≤0
t∈(-1,1)
(2-t-2)²+(2-t-1)²≤2
t²+(-t+1)²≤2
t²+t²-2t+1≤2
2t²-2t-1≤0
Δ=4+8=12
√Δ=2√3
t1=(2-2√3)/4 =(1-√3)/2 ≈ -0.366
t2=(2+2√3)/4 =(1+√3)/2 ≈ 1.366
łączne rozwiązanie:
t∈((1-√3)/2 , 1)