\(9a^2-6ab+b^2-1=\left(3a-b\right)^2-1^2=\left(3a-b-1\right)\left(3a-b+1\right)\)
9a^2 - 6ab + b^2 - 1= (3a)^2 - 2.3a.b + b^2 -1
= (3a - b)^2 - 1^2
= (3a - b - 1).(3a - b + 1)
9a2 - 6ab + b2 - 1 = (3a - b)2 - 1
= (3a - b + 1)(3a-b-1)
\(9a^2-6ab+b^2-1=\left(3a-b\right)^2-1^2=\left(3a-b-1\right)\left(3a-b+1\right)\)
9a^2 - 6ab + b^2 - 1= (3a)^2 - 2.3a.b + b^2 -1
= (3a - b)^2 - 1^2
= (3a - b - 1).(3a - b + 1)
9a2 - 6ab + b2 - 1 = (3a - b)2 - 1
= (3a - b + 1)(3a-b-1)
phan tich da thuc thanh nhan tu \(4a^2b-4ab^2+9a-9b-6a^2+6b^2\)
Phan tich da thuc thanh nhan tu
a) x^2 - 7xy + 10y^2
b) 4x^2 + 12x - 27
c) 81x^4 + 4
d) 3a^2 - 6ab + 3b^2 - 12c^2
e) x^3 + 6x^2 +11x +6
phan tich da thuc 4a2b2+1 thanh nhan tu
phan tich thanh nhan tu:
10x^2-1
Phan tich n^2+n+1 thanh nhan tu
phan tich 4x^4-12x^2+1 thanh cac nhan tu
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: a^2+2ab+b^2-ac-bc
phan tich thanh nhan tu
a)5x^2-4x-1
b)x^3-9x