Question

сократите дробь:
а) ax-bx-ay+by дробь ax+bx-ay-by

Answer 1

$frac{ax-bx-ay+by}{ax+bx-ay-by} = frac{x(a-b)-y(a-b)}{x(a+b)-y(a+b)}= frac{(a-b)(x-y)}{(a+b)(x-y)}= frac{a-b}{a+b}$