Question

factorise 2-a-a²
Answer please

Answer 1

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