Question

phân tích hằng đẳng thức:5n³ -9n² +15n -27

Answer 1

\(5n^3-9n^2+15n-27\)

\(=\left(5n^3-9n^2\right)+\left(15n-27\right)\)

\(=n^2\left(5n-9\right)+3\left(5n-9\right)\)

\(=\left(n^2+3\right)\left(5n-9\right)\)

Answer 2

\(5n^2-9n^2+15n-27\)

\(=\left(5n^3-9n^2\right)+\left(15n-27\right)\)

\(=n^2\left(5n-9\right)+3\left(5n-9\right)\)

\(=\left(n^2+3\right)\left(5n-9\right)\)

Ủng hộ nha