Помогите решить задания по типу: "Решить уравнения". С номера 385 по 394.Если что-то непонятно-спросите в комментариях. Заранее огромное спасибо!
Приложения:
![](https://st.uroker.com/files/048/048e5e19c0f0f69a89f40adab3ac808b.jpg)
Ответы
Ответ дал:
4
385. ![10x^2+5x = 0 10x^2+5x = 0](https://tex.z-dn.net/?f=10x%5E2%2B5x+%3D+0)
![x(10x+5)=0 x(10x+5)=0](https://tex.z-dn.net/?f=x%2810x%2B5%29%3D0)
или
![10x+5 =0 10x+5 =0](https://tex.z-dn.net/?f=10x%2B5+%3D0)
![10x = -5 10x = -5](https://tex.z-dn.net/?f=10x+%3D+-5)
![x = -0,5 x = -0,5](https://tex.z-dn.net/?f=x+%3D++-0%2C5)
386.![12x^2+3x=0 12x^2+3x=0](https://tex.z-dn.net/?f=12x%5E2%2B3x%3D0)
![3x(4x+1) = 0 3x(4x+1) = 0](https://tex.z-dn.net/?f=3x%284x%2B1%29+%3D+0)
![3x = 0 3x = 0](https://tex.z-dn.net/?f=3x+%3D+0)
![x = 0 x = 0](https://tex.z-dn.net/?f=x+%3D+0)
или
![4x+1 = 0 4x+1 = 0](https://tex.z-dn.net/?f=4x%2B1+%3D+0)
![4x=-1 4x=-1](https://tex.z-dn.net/?f=4x%3D-1)
![x = -0,25 x = -0,25](https://tex.z-dn.net/?f=x+%3D+-0%2C25)
387.![25-100x^2 = 0 25-100x^2 = 0](https://tex.z-dn.net/?f=++25-100x%5E2+%3D+0)
![100x^2 = 25 100x^2 = 25](https://tex.z-dn.net/?f=100x%5E2+%3D+25)
![x^2 = \frac{25}{100} x^2 = \frac{25}{100}](https://tex.z-dn.net/?f=x%5E2+%3D+%5Cfrac%7B25%7D%7B100%7D+)
![x= +/- 0,5 x= +/- 0,5](https://tex.z-dn.net/?f=x%3D+%2B%2F-+0%2C5)
388.![4-36x^2=0 4-36x^2=0](https://tex.z-dn.net/?f=4-36x%5E2%3D0)
![36x^2=4 36x^2=4](https://tex.z-dn.net/?f=36x%5E2%3D4)
![x^2 = \frac{4}{36} x^2 = \frac{4}{36}](https://tex.z-dn.net/?f=x%5E2+%3D++%5Cfrac%7B4%7D%7B36%7D+)
![x= +/- \frac{2}{6} x= +/- \frac{2}{6}](https://tex.z-dn.net/?f=x%3D+%2B%2F-++%5Cfrac%7B2%7D%7B6%7D+)
![x= +/- \frac{1}{3} x= +/- \frac{1}{3}](https://tex.z-dn.net/?f=x%3D+%2B%2F-+%5Cfrac%7B1%7D%7B3%7D)
389.![2x^2-14 = 0 2x^2-14 = 0](https://tex.z-dn.net/?f=2x%5E2-14+%3D+0)
![2x^2 = 14 2x^2 = 14](https://tex.z-dn.net/?f=2x%5E2+%3D+14)
![x^2 = 7 x^2 = 7](https://tex.z-dn.net/?f=x%5E2+%3D+7)
![x= +/- \sqrt{7} x= +/- \sqrt{7}](https://tex.z-dn.net/?f=x%3D+%2B%2F-++%5Csqrt%7B7%7D++)
390.![3x^2-6 = 0 3x^2-6 = 0](https://tex.z-dn.net/?f=3x%5E2-6+%3D+0)
![3x^2 = 6 3x^2 = 6](https://tex.z-dn.net/?f=3x%5E2+%3D+6)
![x^2 = 2 x^2 = 2](https://tex.z-dn.net/?f=x%5E2+%3D+2)
![x=+/- \sqrt{2} x=+/- \sqrt{2}](https://tex.z-dn.net/?f=x%3D%2B%2F-++%5Csqrt%7B2%7D+)
391.![2x^2-8 = 0 2x^2-8 = 0](https://tex.z-dn.net/?f=2x%5E2-8+%3D+0)
![2x^2=8 2x^2=8](https://tex.z-dn.net/?f=2x%5E2%3D8)
![x^2 = 4 x^2 = 4](https://tex.z-dn.net/?f=x%5E2+%3D+4)
![x = +/- 2 x = +/- 2](https://tex.z-dn.net/?f=x+%3D+%2B%2F-++2)
392.![3x^2-75=0 3x^2-75=0](https://tex.z-dn.net/?f=3x%5E2-75%3D0)
![3x^2=75 3x^2=75](https://tex.z-dn.net/?f=3x%5E2%3D75)
![x^2 = 25 x^2 = 25](https://tex.z-dn.net/?f=x%5E2+%3D+25)
![x=+/- 5 x=+/- 5](https://tex.z-dn.net/?f=x%3D%2B%2F-+5)
393.![4x^2-12=0 4x^2-12=0](https://tex.z-dn.net/?f=4x%5E2-12%3D0)
![4x^2 = 12 4x^2 = 12](https://tex.z-dn.net/?f=4x%5E2+%3D+12)
![x^2 = 3 x^2 = 3](https://tex.z-dn.net/?f=x%5E2+%3D+3)
![x=+/- \sqrt{3} x=+/- \sqrt{3}](https://tex.z-dn.net/?f=x%3D%2B%2F-++%5Csqrt%7B3%7D+)
394.![3x^2-15=0 3x^2-15=0](https://tex.z-dn.net/?f=3x%5E2-15%3D0)
![3x^2=15 3x^2=15](https://tex.z-dn.net/?f=3x%5E2%3D15)
![x^2=5 x^2=5](https://tex.z-dn.net/?f=x%5E2%3D5)
![x=+/- \sqrt{5} x=+/- \sqrt{5}](https://tex.z-dn.net/?f=x%3D%2B%2F-++%5Csqrt%7B5%7D+)
или
386.
или
387.
388.
389.
390.
391.
392.
393.
394.
Аноним:
вы монстр))
Ответ дал:
0
385.
10x²+5x=0
5x*(2x+1)=0 |÷5
x*(2x+1)=0
x₁=0 x₂=-1/2.
386.
12x²+3x=0
3x*(4x+1)=0 |÷3
x*(4x+1)=0
x₁=0 x₂=-1/4.
387.
25-100x²=0
100x²=25 |÷25
4x²=1
x²=1/4
x₁=1/2 x₂=-1/2.
388.
4-36x²=0
36x²=4 |÷4
9x²=1
x²=1/9
x₁=1/3 x₂=-1/3.
389.
2x²-14=0
2x²=14 |÷2
x²=7
x₁=√7 x₂=-√7.
390.
3x²-6=0
3x²=6 |÷3
x²=2
x₁=√2 x₂=-√2.
391.
2x²-8=0
2x²=8 |÷2
x²=4
x₁=2 x₂=-2.
392.
3x²-75=0
3x²=75 |÷3
x²=25
x₁=5 x₂=-5.
393.
4x²-12=0
4x²=12 |÷4
x²=3
x₁=√3 x₂=-√3.
394.
3x²-15=0
3x²=15 |÷3
x²=5
x₁=√5 x₂=-√5.
10x²+5x=0
5x*(2x+1)=0 |÷5
x*(2x+1)=0
x₁=0 x₂=-1/2.
386.
12x²+3x=0
3x*(4x+1)=0 |÷3
x*(4x+1)=0
x₁=0 x₂=-1/4.
387.
25-100x²=0
100x²=25 |÷25
4x²=1
x²=1/4
x₁=1/2 x₂=-1/2.
388.
4-36x²=0
36x²=4 |÷4
9x²=1
x²=1/9
x₁=1/3 x₂=-1/3.
389.
2x²-14=0
2x²=14 |÷2
x²=7
x₁=√7 x₂=-√7.
390.
3x²-6=0
3x²=6 |÷3
x²=2
x₁=√2 x₂=-√2.
391.
2x²-8=0
2x²=8 |÷2
x²=4
x₁=2 x₂=-2.
392.
3x²-75=0
3x²=75 |÷3
x²=25
x₁=5 x₂=-5.
393.
4x²-12=0
4x²=12 |÷4
x²=3
x₁=√3 x₂=-√3.
394.
3x²-15=0
3x²=15 |÷3
x²=5
x₁=√5 x₂=-√5.
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