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maylytail

x(x - 2) + 7 - (3x - 2)^{2}  =  {x}^{2}  - 2x + 7 - (9 {x}^{2}  - 12x + 4) =  \  =  {x}^{2}  - 2x + 7 - 9 {x}^{2}  + 12x - 4 =  - 8 {x}^{2}  + 10x + 3 = -  8( x +  frac{1}{4})(x -  frac{3}{2}) =  \  =  - (  4x  +  1)( 2x  -  3) \ d = 100 + 96 = 196 \ x1 =  frac{ - 10 + 14}{ - 16}  =  -  frac{1}{4}  \ x2 =  frac{ - 10 - 14}{ - 16}  =   frac{3}{2}

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