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1)
![12xy-3y^{2}=3y*(4x-y) 12xy-3y^{2}=3y*(4x-y)](https://tex.z-dn.net/?f=12xy-3y%5E%7B2%7D%3D3y%2A%284x-y%29)
2)
![(m-2)(m+5)=m^{2}+3m-10 (m-2)(m+5)=m^{2}+3m-10](https://tex.z-dn.net/?f=%28m-2%29%28m%2B5%29%3Dm%5E%7B2%7D%2B3m-10)
3)
![a*(x-2)+b*(x-2)=ax-2a+bx-2b=(x-2)*(a+b) a*(x-2)+b*(x-2)=ax-2a+bx-2b=(x-2)*(a+b)](https://tex.z-dn.net/?f=a%2A%28x-2%29%2Bb%2A%28x-2%29%3Dax-2a%2Bbx-2b%3D%28x-2%29%2A%28a%2Bb%29)
4)
![3x-2*(x+4)=5 3x-2*(x+4)=5](https://tex.z-dn.net/?f=3x-2%2A%28x%2B4%29%3D5)
![3x-2x-8=5 3x-2x-8=5](https://tex.z-dn.net/?f=3x-2x-8%3D5)
![x=5+8 x=5+8](https://tex.z-dn.net/?f=x%3D5%2B8)
![x=13 x=13](https://tex.z-dn.net/?f=x%3D13)
5)
![(x+y)*(x-y)+4x^{2}=x^{2}-y^{2}+4x^{2}=5x^{2}-y^{2} (x+y)*(x-y)+4x^{2}=x^{2}-y^{2}+4x^{2}=5x^{2}-y^{2}](https://tex.z-dn.net/?f=%28x%2By%29%2A%28x-y%29%2B4x%5E%7B2%7D%3Dx%5E%7B2%7D-y%5E%7B2%7D%2B4x%5E%7B2%7D%3D5x%5E%7B2%7D-y%5E%7B2%7D)
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