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оля692
@оля692
June 2022
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решите уравнение ×^2+7=8х
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Hikyn
X^2-8x+7=0
D=64-28
Корень из D=6
x1=(8+6)/2=7
x2=(8-6)/2=1
Ответ. 7, 1
1 votes
Thanks 3
Rem1ngtoN
Х^2-8x+7=0
x 1,2 = 8 +- √ (-8)² - 4*1*7 / 2*1 = 8+-6 / 2
х1 = 8 + 6 / 2 = 7
х2 = 8 - 6 / 2 = 1
Ответ: х1 = 7
х2 = 1
0 votes
Thanks 0
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Answers & Comments
D=64-28
Корень из D=6
x1=(8+6)/2=7
x2=(8-6)/2=1
Ответ. 7, 1
x 1,2 = 8 +- √ (-8)² - 4*1*7 / 2*1 = 8+-6 / 2
х1 = 8 + 6 / 2 = 7
х2 = 8 - 6 / 2 = 1
Ответ: х1 = 7
х2 = 1