Question

Второй пример во второй строчке
1/4р+q- 1/4p-q

Answer 1

1/(4p+g)-1/(4p-g)=((4p-g)-(4p+g))/((4p+g)*(4p-g))=(4p-g-4p-g)/(4p-g) ^2=-2g/(4p-g)^2