a) 16x2-(x2+4)2= (4x)2-(x2+4)2
= (4x-x2-4)(4x+x2+4)
\(\text{b) 27x^3-54x^2+36x-8=[(3x)^3-3.(3x)^2.2+3.3x.2^2-2^3}]\)
= (3x-2)3
\(\text{c) (x+y)^3 - (x-y)^3= (x+y-x+y)[(x+y)^2+(x+y)(x-y)+(x-y)^2]}\)
=2y(x2+2xy+y2+x2-y2+x2-2xy+y2)
= 2y(3x2+y2)
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 thanh nhan tu bang pp dung hang dang thuc 1+8x^6y^3
phan tich da thuc thanh nhan tu bang cach them bot cung 1 hang tu
:\(x^3+x^2+4\)
Phan tich da thuc thanh nhan tu:
a)27x^3-27x^2+18x-4
b)2x^3-x^2-x-2
c)(x^2-3)^2+16
phan tich da thuc sau thanh nhan tu : x^4 - 6x^3 + 54x - 81
phan tich da thuc thanh nhan tu
a) m^2 -7m +12
b) 2x^4 -x^3 -54x +27
Phan tich da thuc thanh nhan tu
\(\left(xy+4\right)^2-4\left(x+y\right)^2\)
\(x^4-4x^3+8x^2-16x+16\)
Phan tich thanh nhan tu bang ki thuat no sung hang dang thuc.
3x^2+8xy-3y^2
x^2 - x - xy - 2y^2+2y
x^2+2y^2-3xy + x -2y
x^2+x-xy-2y^2+y
Phan tich thanh nhan tu bang ki thuat no sung hang dang thuc.
3x^2+8xy-3y^2
x^2 - x - xy - 2y^2+2y
x^2+2y^2-3xy + x -2y
x^2+x-xy-2y^2+y
