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1) ![( 2x-5)^{2} - (2x - 3)(2x + 3) = 15
( 2x-5)^{2} - (2x - 3)(2x + 3) = 15](https://tex.z-dn.net/?f=%28+2x-5%29%5E%7B2%7D+-+%282x+-+3%29%282x+%2B+3%29+%3D+15++++++%0A+)
![4 x^{2} - 20x + 25 - (4 x^{2} - 9) = 15 4 x^{2} - 20x + 25 - (4 x^{2} - 9) = 15](https://tex.z-dn.net/?f=4+x%5E%7B2%7D+-+20x+%2B+25+-+%284+x%5E%7B2%7D+-+9%29+%3D+15)
![4 x^{2} - 20x + 25 - 4 x^{2} + 9 = 15 4 x^{2} - 20x + 25 - 4 x^{2} + 9 = 15](https://tex.z-dn.net/?f=4+x%5E%7B2%7D++-+20x+%2B+25+-+4+x%5E%7B2%7D++%2B+9+%3D+15)
![-20x + 34 = 15 -20x + 34 = 15](https://tex.z-dn.net/?f=-20x+%2B+34+%3D+15)
![-20x = 15 - 34 -20x = 15 - 34](https://tex.z-dn.net/?f=-20x+%3D+15+-+34)
![-20x = -19 -20x = -19](https://tex.z-dn.net/?f=-20x+%3D+-19)
![x = frac{19}{20} x = frac{19}{20}](https://tex.z-dn.net/?f=x+%3D++frac%7B19%7D%7B20%7D+)
2)![(9x + 2)(1 - 4x)+(5-6x)^{2} = -32 (9x + 2)(1 - 4x)+(5-6x)^{2} = -32](https://tex.z-dn.net/?f=%289x+%2B+2%29%281+-+4x%29%2B%285-6x%29%5E%7B2%7D+%3D+-32)
![9x - 36 x^{2} + 2 - 8x + 25 - 60x + 36 x^{2} = -32 9x - 36 x^{2} + 2 - 8x + 25 - 60x + 36 x^{2} = -32](https://tex.z-dn.net/?f=9x+-+36+x%5E%7B2%7D+%2B+2+-+8x+%2B+25+-+60x+%2B+36+x%5E%7B2%7D+%3D+-32)
![-59x + 27 = -32 -59x + 27 = -32](https://tex.z-dn.net/?f=-59x+%2B+27+%3D+-32)
![-59x = -32 -27 -59x = -32 -27](https://tex.z-dn.net/?f=-59x+%3D+-32+-27)
![-59x = -59 -59x = -59](https://tex.z-dn.net/?f=-59x+%3D+-59)
![x = 1 x = 1](https://tex.z-dn.net/?f=x+%3D+1)
2)
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