Question

(10x la a 3-8x la a 2):(-2x la a 2)

Answer 1

2x²(5x - 4):(-2x²) = 4 - 5x

Answer 2

$(10x^{3} -8x^{2}):(-2x^{2})=\\ =2x^{2}(5x -4):[-(2x^{2})]=\\ =(5x-4):(-1)=\\ =(5x-4)*(-1)=\\ =-5x+4=\\ =4-5x$

Pt. orice x diferit de 0