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motokrossbike70
@motokrossbike70
June 2022
1
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Как решить?
Сижу
Думаю, ну не прет в субботу вечером
Ребят, помогите)
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mikael2
Verified answer
4. x²+3x-18=0 теорема виета x1= -6 x2=3 -6*3= -18 -(x1+x2) =3
далее так же
5. x²-5x+6=0 x1=2 x2=3
6. 5x²+20x=0 5x(x+4)=0 x=0
x=-4
7. x²-5x-14=0 x1=7 x2=-2
8. x²+2x-15=0 x1= -5 x2=3
9. 1-7(4+2x)=-9-4x 1-38-14x+9+4x=0
10x= -28 x= -2.8
10. 4x² -20x=0 4x(x-5) =0 x1=0
x2=5
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Answers & Comments
Verified answer
4. x²+3x-18=0 теорема виета x1= -6 x2=3 -6*3= -18 -(x1+x2) =3далее так же
5. x²-5x+6=0 x1=2 x2=3
6. 5x²+20x=0 5x(x+4)=0 x=0 x=-4
7. x²-5x-14=0 x1=7 x2=-2
8. x²+2x-15=0 x1= -5 x2=3
9. 1-7(4+2x)=-9-4x 1-38-14x+9+4x=0
10x= -28 x= -2.8
10. 4x² -20x=0 4x(x-5) =0 x1=0 x2=5