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ZindaggiRock
@ZindaggiRock
July 2022
1
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рішити систему рівнянь з двома змінними
х-у=2
х+ух=20
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zipzona
Verified answer
1) x=2+y
(2+y)+y(2+y)=20
2) x=2+y
2+y+2y+y^2=20
3) x=2+y
y^2+3y+2-20=0
4) x=2+y
y^2+3y-18=0
5) x=2+y
y=3 или y=-6
a=1 b=3 c= -18
D= b^2-4ac = 9-4*1*(-18)= 81
X12= -b+-корень из 81 деленное на 2 = -3+-9/2
X1= -3+9/2= 3
X2= -12/2=-6
6) x= 5 или x=-4
y= 3 y= -6
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ZindaggiRock
спасибо большое
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Answers & Comments
Verified answer
1) x=2+y(2+y)+y(2+y)=20
2) x=2+y
2+y+2y+y^2=20
3) x=2+y
y^2+3y+2-20=0
4) x=2+y
y^2+3y-18=0
5) x=2+y
y=3 или y=-6
a=1 b=3 c= -18
D= b^2-4ac = 9-4*1*(-18)= 81
X12= -b+-корень из 81 деленное на 2 = -3+-9/2
X1= -3+9/2= 3
X2= -12/2=-6
6) x= 5 или x=-4
y= 3 y= -6