a/ \(4x^2-49=\left(2x\right)^2-7^2=\left(2x-7\right)\left(2x+7\right)\)
b/ \(a^2-2a-b^2-2b=\left(a^2-2a+1\right)-\left(b^2+2b+1\right)=\left(a-1\right)^2-\left(b+1\right)^2\)
\(=\left(a-1-b-1\right)\left(a-1+b+1\right)=\left(a-b-2\right)\left(a+b\right)\)
Phan tich da thuc thanh nhan tu
a(a+2b)^3-b(2a+b)^3
phan tich da thuc:(a^2+b^2-c^2)^2-4a^2b^2 thanh nhan tu
phan tich da thuc thanh nhan tu
4a^2b^2-(a^2+b^2-c^2)^2
Phan tich da thuc thanh nhan tu x^2(1-x^2)-4-4x^2
phan tich da thuc thanh nhan tu: 4x^4-32x^2+1
phan tich da thuc thanh nhan tu
x^2(1-x^2)-4-4x^2
(x^2+x)^2+4x^2+4x-12 phan tich da thuc thanh nhan tu
phan tich da thuc thanh nhan tu : 4x^4+4x^3+5x^2 +2x +1
4x^4+4x^3+5^2+2x+1
phan tich da thuc thanh nhan tu
