=4x2-y2+8y-16
=4x2-(y2 - 8y+16)
=4x2-(y-4)2
=(2x+y-4)(2x-y+4)
4x2-y2+8(y-2)
=4x2-y2+8.y-8.2
=4x2-y2+8y-16
phan tich da thuc thanh nhan tu
x^2-x-y^2-y
x^2-2xy+y^2-z^2
bai 32 va 33 sbt
lop 8 bai phan tich da thuc thanh nhan tu bang cach nhom hang tu
phan tich da thuc thanh nhan tu:
4x^4-21x^2y^2+y^4
phan tich da thuc sau thanh nhan tu (bang cach dat nhan tu chung)
(4x-y)(a+b)(4x-y)(c-1)
1. x2-4x-y2+4
2. (x-y)2-(x+y)2
Phan tich da thuc thanh nhan tu
(x^2+x)^2+4x^2+4x-12 phan tich da thuc thanh nhan tu
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
phan tich da thuc thanh nhan tu
(1+X^2)^2-4X(1-X^2)
(x^2-8)^2+36
Phan tich da thuc x^2 + y^3 + 2x^2 -2cy + 2y^2 thanh nhan tu
