Question

Doar cine stie sa raspunda, cum se scrie 2x^2 -x-3

Answer 1

${2x}^{2} - x - 3 = {2x}^{2} - 3x + 2x - 3 = x( \frac{ {2x}^{2} }{x} - \frac{3x}{x}) + (2x - 3) = x( {2x}^{2 - 1} - 3) + (2x - 3) = x(2x - 3) + (2x - 3) = (2x - 3)( \frac{x(2x - 3)}{2x - 3} + \frac{2x - 3}{2x - 3}) = (2x - 3)(x + 1)$