Bài 1:
a: \(48x^3y^3-32x^2y^2\)
\(=16x^2y^2\cdot3xy-16x^2y^2\cdot2\)
\(=16x^2y^2\left(3xy-2\right)\)
c: \(12a^2b-18ab^2-30b^2\)
\(=6b\cdot2a^2-6b\cdot3ab-6b\cdot5b\)
\(=6b\left(2a^2-3ab-5b\right)\)
d: \(27a^2\left(b-1\right)-9a^3\left(1-b\right)\)
\(=9a^3\left(b-1\right)+27b^2\left(b-1\right)\)
\(=\left(b-1\right)\left(9a^3+27a^2\right)=9a^2\left(b-1\right)\left(a+3\right)\)
