Question

Сократите дробь a²-5a-14/a²-49

Answer 1

a²-5a-14/a²-49=a²-5a-14/(a-7)*(a+7)=(a+2)/(a+7)
a^2-5a-14=0
D=81
a1=7
a2=-2

a²-5a-14=(a-7)*(a+2)

Answer 2

a^2-5a-14=0

D=b2-4*a*c=25+56=81

a1=-2

a2=7

a^2-5a-14=(a+2)*(a-7)

a^2-49=(a-7)*(a+7)

(a+2)*(a-7)/(a-7)*(a+7)=(a+2)/(a+7)