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olgabudanova77
@olgabudanova77
October 2021
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m11m
A) (p-3)² = 2(p+1)
p² -6p+9=2p+2
p² -6p-2p+9-2=0
p² -8p+7=0
D=64-28=36
p₁=
8-6
= 1
2
p₂ =
8+6
=7
2
Ответ: 1; 7.
б) (3с-5)² =10с+9
9с² -30с+25=10с+9
9с² -30с-10с+25-9=0
9с² -40с+16=0
D= 1600 -4*9*16 = 1600 - 576 =1024
c₁ =
40 - 32
= 8/18 = 4/9
18
c₂ =
40+32
= 4
18
Ответ: 4/9; 4.
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Answers & Comments
p² -6p+9=2p+2
p² -6p-2p+9-2=0
p² -8p+7=0
D=64-28=36
p₁= 8-6 = 1
2
p₂ = 8+6 =7
2
Ответ: 1; 7.
б) (3с-5)² =10с+9
9с² -30с+25=10с+9
9с² -30с-10с+25-9=0
9с² -40с+16=0
D= 1600 -4*9*16 = 1600 - 576 =1024
c₁ = 40 - 32 = 8/18 = 4/9
18
c₂ = 40+32 = 4
18
Ответ: 4/9; 4.