Question

viết thành nhân tử

a^2(b-c)+b^2(a-c)+c^2(a-b)

Answer 1

=a^2b-a^2c+b^2a-b^2c+c^2a-c^2b

=b(a^2-c^2)-a^2c+c^2a+b^2a-b^2c

=b(a-c)(a+c)-ac(a-c)+b^2(a-c)

=(a-c)(ba+bc-ac+b^2)