[6x²+4x-10]/(3x+5)=[2(3x+5)(x-1)]/(3x+5)=2(x-1)=2x-2希望能帮你忙,不懂请追问,懂了请采纳,谢谢
6x²+4x-10=2[3x²+2x-5]=3(3x+5)(x-1),则:[6x²+4x-10]/(3x+5)=[2(3x+5)(x-1)]/(3x+5)=2(x-1)=2x-2
把多项式因式分解得2(x-1)(3x+5),这不就显而易见了。或者用多项式除法直接除,多项式除法跟小学学的数除法差不多,不明白再追问吧!