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1. `a) 4x^2-4x-3`

   `=4x^2-6x+2x-3`

   `=2x(2x-3)+(2x-3)`

   `=(2x-3)(2x+1)`

   `b) 2x^2-5x-3`

   `=2x^2-6x+x-3`

   `=2x(x-3)+(x-3)`

   `=(x-3)(2x+1)`

   `c) 3x^2-5x+2`

   `=3x^2-3x-2x+2`

   `=3x(x-1)-2(x-1)`

   `=(x-1)(3x-2)`

   `d) 2x^2+5x+2`

   `=2x^2+4x+x+2`

   `=2x(x+2)+(x+2)`

   `=(x+2)(2x+1)`

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