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Alenka2304
@Alenka2304
July 2022
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решите уравнение 2х^2-х-6=0
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Willyl
2x^2-x-6=0
a=2; b= -1; с= -6
D= b^2 - 4ac
D=1-(-48)=49
Корень из D =7
x1= -(-1)+ 7 = 2
4
x2= -(-1) - 7 = -1,5
4
Ответ: -1,5:2
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Thanks 0
Juniorxenox
A=2, b=-1, c=-6
D=b^2-4*a*c=(-1)^2-4*2*(-6)=1+48=49
x1=(-b+D^(1/2))/(2*a)=(1+7)/(2*2)=8/4=2
x2=(-b-D^(1/2))/(2*a)=(1-7)/(2*2)=-6/4=-3/2=-1,5
Ответ x=2; -1,5
*D^(1/2)=корень из D
0 votes
Thanks 0
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Answers & Comments
a=2; b= -1; с= -6
D= b^2 - 4ac
D=1-(-48)=49
Корень из D =7
x1= -(-1)+ 7 = 2
4
x2= -(-1) - 7 = -1,5
4
Ответ: -1,5:2
D=b^2-4*a*c=(-1)^2-4*2*(-6)=1+48=49
x1=(-b+D^(1/2))/(2*a)=(1+7)/(2*2)=8/4=2
x2=(-b-D^(1/2))/(2*a)=(1-7)/(2*2)=-6/4=-3/2=-1,5
Ответ x=2; -1,5
*D^(1/2)=корень из D