=(a2)2-[b(2a-b)]2
=(a2-b(2a-b))(a2+b(2a-b))
=(a2-2ab+b2)(a2+2ab-b2)
=(a-b)2(a2+2ab-b2)
phan tich da thuc thanh nhan tu a, (3x+1)^2-(x+1)^2
b, 6x-6y-x^2+xy
phan tich da thuc thanh nhan tu B=\(\left(x^2-y^2+1\right)^3-x^6-y^6-1\)
phan tich da thuc thanh nhan tu
xm+2 - xm
81x4+4.Phan tich da thuc thanh nhan tu.
phan tich da thuc thanh nhan tu a(b^3-c^3)+b(c^3-a^3)+c(a^3-b^3)
phan tich da thuc thanh nhan tu x^3 +y^3-z^3+3xyz
Phan tich da thuc thanh nhan tu:
m3+27
\(\frac{1}{27}\)+a3
(a+b)3-c3
x9+1
x3+9x2+27x+27
Phan tich cac da thuc sau thanh nhan tu:
a, -4x2+4x-1
b,(2x+1)2-4(x-1)2
c,(2x+y)2-4x2+12x-9
d, (x+1)2-4(x+1)y2+4y4
3.7: Su dung cac hang dang thuc de phan tich cac da thuc sau thanh nhan tu:
a) -y2 + 1/9
b) x4 - 256
c) 9 (x - 3)2 - 4 (x + 1)2
d) 25x2 - 1/81 x2y2
