Minta tolong, pake cara ya kak

6x(2x-5)³=6x((2x-5)(2x-5)(2x-5))
=6x((4x²-10x-10x+25)(2x-5))
=6x((4x²-20x+25)(2x-5))
=6x(8x³-20x²-40x²+100x+50x-125)
=6x(8x³-60x²+150x-125)
=48x⁴-360x³+900x²-750x