Question

factorise these questions by grouping terms.​

Answer 1

Answer:

1.

${x}^{2} - ax - bx + ab \\ = x(x - a) - b(x - a) \\ = (x - a)(x - b)$

2.

$ax - {x}^{2} - bx + ab \\ = x(a - x) + b( - x + a) \\ = x(a - x) + b(a - x) \\ = (a - x)(x + b)$