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Style55
@Style55
July 2022
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4 задание, пожалуйста) 9 класс
найти p
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m11m
Х₁= -5
х₂= 4
По т.Виета:
х₁+х₂ = -p
-5+4= -p
-1 = -p
p=1
Ответ: 1
2 votes
Thanks 1
AnimFok
По теореме Виета можно легко определить p
x1 =-5
x2=4
p= x1+x2 = -1 = 1 (x1-x2= -p)
q= -5*4=-20
x^2+x-20=0
D= 1-4*1*(-20) = 1+80= 81 = 9^2
x1= -1+9\2 =4
x2= -1-9\2 = -5
Ответ p=1
1 votes
Thanks 1
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Answers & Comments
х₂= 4
По т.Виета:
х₁+х₂ = -p
-5+4= -p
-1 = -p
p=1
Ответ: 1
x1 =-5
x2=4
p= x1+x2 = -1 = 1 (x1-x2= -p)
q= -5*4=-20
x^2+x-20=0
D= 1-4*1*(-20) = 1+80= 81 = 9^2
x1= -1+9\2 =4
x2= -1-9\2 = -5
Ответ p=1