Question

Спростіть вираз 4/(х+5)∙(х^2-25)/2

Answer 1

$\displaystyle\bf\\\frac{4}{x+5} \cdot\frac{x^{2} -25}{2} =\frac{4\cdot(x+5)\cdot(x-5)}{(x+5)\cdot 2} =2\cdot (x-5)=2x-10$