Question

Сократите дробь:
2a^3+2b^3\a^2-b^2
При a=2,b=3

Answer 1

2(a+b)(a²-ab+b²)/[(a-b)(a=b)]=2(a²-ab+b²)/(a-b)
a=2,b=3
2(4-6+9)/(2-3)=-2*7=-14