Question

СОКРАТИТЬ

b^(2)/frac(2b-14)+49/frac(14-2b)

 

Answer 1

b2/(2b-14)+49/(14-2b)=b2/(2b-14)-49/(2b-14)=(b2-49)/(2b-14)=(b+7)*(b-7)/(2*(b-7))=(b+7)/2