jabarkanlah a.(4x - 3)pangkat 2 b.(2x - 5)pangkat 3 #mohon dijawab

a.(4x-3)² = (4x-3)(4x-3)
= 16x²-24x+9

b.(2x-5)³ = (2x-5)(2x-5)(2x-5)
= (4x²-20x+25)(2x-5)
= 8x³-60x²-50x-125