t²-24,8t-5=0;
D=615,04+4*5=635,04=25,2²;
t=(24,8+25,2)/2=25;
t=(24,8-25,2)/2=-0,2; ∅;
_____________
0,25=4⁻¹;
t²-15t-16=0;
D=225+4*16=289;
t=(15-17)/2=-1;∅
t=(15-17)/2=16;
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Answers & Comments
t²-24,8t-5=0;
D=615,04+4*5=635,04=25,2²;
t=(24,8+25,2)/2=25;
t=(24,8-25,2)/2=-0,2; ∅;
_____________
0,25=4⁻¹;
t²-15t-16=0;
D=225+4*16=289;
t=(15-17)/2=-1;∅
t=(15-17)/2=16;