Заполни пропуски

а) \(x^2+3x\,-\) [ ] \(=(x-2)(x\,+\) [ ] \()\) ;

б) \(2x^2-7x\,+\) [ ] \(=2(x-3)(x\,-\) [ ] \()\) ;

в) \(10x^2+9x\,-\) [ ] \(=10\left(x-\dfrac{1}{10}\right)(\) [ ] \()\) ;

г) \(32x^2+28x\) [ ] \(=32\left(x+\dfrac{1}{4}\right)(\) [ ] \()\) .