Question

Phan tich thanh nhan tu

(a²+b²+ab)²- a²b² -  b²c² - c²a²

Answer 1

mk ghi đáp án thui nhé 

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

Answer 2

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

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

=(a^2+b^2)^2+2ab(a^2+b^2)-[c^2(a^2+b^2)]

=(a^2+b^2)[(a^2+b^2)+2ab-c^2]

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

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

Answer 3

cám ơn