Ответы
Ответ дал:
0
1)
![2 x^{2} +3xy-2y^2=2(x-0.5y)(x+2y)=(2x-y)(x+2y) 2 x^{2} +3xy-2y^2=2(x-0.5y)(x+2y)=(2x-y)(x+2y)](https://tex.z-dn.net/?f=2+x%5E%7B2%7D+%2B3xy-2y%5E2%3D2%28x-0.5y%29%28x%2B2y%29%3D%282x-y%29%28x%2B2y%29)
![2x^2+3xy-2y^2=0 2x^2+3xy-2y^2=0](https://tex.z-dn.net/?f=2x%5E2%2B3xy-2y%5E2%3D0)
![a=2 a=2](https://tex.z-dn.net/?f=a%3D2)
![b=3y b=3y](https://tex.z-dn.net/?f=b%3D3y)
![c=-2y^2 c=-2y^2](https://tex.z-dn.net/?f=c%3D-2y%5E2)
![D=(3y)^2-4*2*(-2y^2)=25y^2 D=(3y)^2-4*2*(-2y^2)=25y^2](https://tex.z-dn.net/?f=D%3D%283y%29%5E2-4%2A2%2A%28-2y%5E2%29%3D25y%5E2)
![x_1= frac{-3y+5y}{4}=0.5y x_1= frac{-3y+5y}{4}=0.5y](https://tex.z-dn.net/?f=x_1%3D+frac%7B-3y%2B5y%7D%7B4%7D%3D0.5y+)
![x_2= frac{-3y-5y}{4}=-2y x_2= frac{-3y-5y}{4}=-2y](https://tex.z-dn.net/?f=x_2%3D+frac%7B-3y-5y%7D%7B4%7D%3D-2y+)
2)
![x^4+4= (x^{2} )^{2} +2^2+2*2*x^2-2*2*x^2=( (x^{2} )^{2}+2^2+4x^2)-4x^2= x^4+4= (x^{2} )^{2} +2^2+2*2*x^2-2*2*x^2=( (x^{2} )^{2}+2^2+4x^2)-4x^2=](https://tex.z-dn.net/?f=x%5E4%2B4%3D+%28x%5E%7B2%7D+%29%5E%7B2%7D+%2B2%5E2%2B2%2A2%2Ax%5E2-2%2A2%2Ax%5E2%3D%28+%28x%5E%7B2%7D+%29%5E%7B2%7D%2B2%5E2%2B4x%5E2%29-4x%5E2%3D)
![=(x^2+2)^2-(2x)^2=(x^2+2+2x)(x^2+2-2x) =(x^2+2)^2-(2x)^2=(x^2+2+2x)(x^2+2-2x)](https://tex.z-dn.net/?f=%3D%28x%5E2%2B2%29%5E2-%282x%29%5E2%3D%28x%5E2%2B2%2B2x%29%28x%5E2%2B2-2x%29)
2)
Вас заинтересует
6 лет назад
8 лет назад
8 лет назад
9 лет назад