\(4a^2b^2-\left(a^2+b^2-c^2\right)^2\)

\(=\left(2ab-a^2-b^2+c^2\right)\left(2ab+a^2+b^2-c^2\right)\)

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

\(=-\left(a-b-c\right)\left(a-b+c\right)\left(a+b-c\right)\left(a+b+c\right)\)

\(4a^2b^2-\left(a^2+b^2-c^2\right)^2\)

\(=4a^2b^2-2ab\left(a^2+b^2-c^2\right)+2ab\left(a^2+b^2-c^2\right)-\left(a^2+b^2-c^2\right)^2\)

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

\(=\left(2ab+a^2+b^2-c^2\right)\left(2ab-a^2-b^2+c^2\right)\)

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

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

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

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

\(=\left[\left(a+b\right)\left(a+b-c\right)+c\left(a+b-c\right)\right]\left[c\left(c+a-b\right)-\left(a-b\right)\left(c+a-b\right)\right]\)

\(=\left(a+b+c\right)\left(a+b-c\right)\left(c+a-b\right)\left(c-a+b\right)\)

\(=2ab\left(2b+a\right)\left(y+x\right)\)

=2ab.[a+2b]+c^2.[a+2b]- c.[a^2+4ab+4.b^2]

=.................................-c[a+2b]^2

=[a+2b].{2ab+c^2-ca-2bc]

=[a+2b]{ 2b.[a-c]-c.[a-c] }

=[a+2b].[a-c].[2b-c]

2a^2b + 4ab^2 -a^2c + ac^2 -4b^2c +2bc^2 - 4abc 
= (2a^2b - 4abc + 2bc^2) + (4ab^2 - 4b^2c) - (a^2c - ac^2) 
= 2b(a^2 - 2ac + c^2) + 4b^2(a - c) - ac(a - c) 
= 2b(a - c)^2 + 4b^2(a - c) - ac(a - c) 
= (a - c)  [ 2b(a - c) + 4b^2 - ac ] 
= (a - c) (2ab -2bc +4b^2 - ac) 
= (a - c)  [ (2ab - ac) + (4b^2 - 2bc) ] 
= (a - c) [a(2b - c) + 2b(2b - c)] 
= (a - c)(2b - c)(a + 2b)

TL:

=\(\left(2a^2b-4bc+2bc^2\right)+\left(4ab^2-4b^2c\right)-\left(a^2c-ac2\right)\) 

=\(2b\left(a^2-2c+c^2\right)+4b^2\left(a-c\right)-ac\left(a-c\right)\) 

=\(2b\left(a-c\right)+4b^2\left(a-c\right)-ac\left(a-c\right)\) 

=\(\left(a-c\right)\left(2b+4b^2-ac\right)\)

........................

Vậy......

(b+a)(c+2a)(c+2b)

Ai kb vs tui ko 

buồn quá hời!!

OLM đừng trừ điểm en nha 

đừng đưa nội quy mk bt hết oi

kiếm bn để chat thui!! ^.^