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BloodsekeerChan
@BloodsekeerChan
July 2022
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Решение рациональных дробей. Прикреплено.
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m11m
Verified answer
1.
x≠5
x²+3x-10=0
D=3²-4*(-10)=9+40=49=7²
x₁=(-3-7)/2= -5
x₂=(-3+7)/2=2
Ответ: -5; 2.
2.
x≠4
x²+3x-28=0
D=3²-4*(-28)=9+112=121=11²
x₁=(-3-11)/2=-7
x₂=(-3+11)/2=4 - не подходит
Ответ: -7/
3.
x≠0
x≠ -2
x(2x+3)-(3x+2)(x+2)=0
2x²+3x-3x²-2x-6x-4=0
-x²-5x-4=0
x²+5x+4=0
D=5²-4*4=25-16=9=3²
x₁=(-5-3)/2= -4
x₂=(-5+3)/2= -1
Ответ: -4; -1.
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Answers & Comments
Verified answer
1.x≠5
x²+3x-10=0
D=3²-4*(-10)=9+40=49=7²
x₁=(-3-7)/2= -5
x₂=(-3+7)/2=2
Ответ: -5; 2.
2.
x≠4
x²+3x-28=0
D=3²-4*(-28)=9+112=121=11²
x₁=(-3-11)/2=-7
x₂=(-3+11)/2=4 - не подходит
Ответ: -7/
3.
x≠0
x≠ -2
x(2x+3)-(3x+2)(x+2)=0
2x²+3x-3x²-2x-6x-4=0
-x²-5x-4=0
x²+5x+4=0
D=5²-4*4=25-16=9=3²
x₁=(-5-3)/2= -4
x₂=(-5+3)/2= -1
Ответ: -4; -1.