Question

Rút gọn:
(-2007x⁴y³)⁵.\(\left(-\dfrac{1}{2007}x^4y\right)^5\)

Answer 1

(-2007\(x^9y^8\)) .(-\(\dfrac{-1}{2017}x^9y^5\)) = (\(-2007.\dfrac{-1}{2007}\)) . ( \(x^9y^8x^9y^5\)) = \(x^{18}y^{13}\)

Answer 2

Rút gọn :

\(\left(-2007x^4y^3\right)^5.\left(-\dfrac{1}{2007}x^4y\right)^5\)

\(=\left(-2007\right)^5.x^{20}.y^{15}.\left(-\dfrac{1}{2007}\right)^5x^{20}y^5\)

\(=\left[\left(-2007\right)^5.\left(\dfrac{-1}{2007}\right)^5\right]\left(x^{20}.x^{20}\right)\left(y^{15}y^5\right)\)

\(=1x^{40}y^{20}\)