化简代数式3x/(4x+1)- 2x/(5x-3)

问题描述:

化简代数式
3x/(4x+1)- 2x/(5x-3)

(7x²-11x)/(20x²-7x-3)

3x/(4x+1)- 2x/(5x-3)
=3x(5x-3)/(4x+1)(5x-3)-2x(4x+1)/(4x+1)(5x-3)
=(15x^2-9x-8x^2-2x)/(20x^2-7x-3)
=(7x^2-11x)/(20x^2-7x-3)