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anyailnicka
@anyailnicka
July 2022
1
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помогите пожалуста (х-4) * (5-х)=0
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Дарешка
5x-20+4x-x^2=0
x^2-9x+20=0
D = (-9)^2 -4*1*20 = 81-80=1
x= (9+1)/2=10/2=5;
x= (9-1)/2=8/2=4
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Answers & Comments
x^2-9x+20=0
D = (-9)^2 -4*1*20 = 81-80=1
x= (9+1)/2=10/2=5;
x= (9-1)/2=8/2=4