已知f(x)=10x^2+8x^5-12x^3求:f(x)÷(-5x^2)和f(x)×(x^2-1)的值

问题描述:

已知f(x)=10x^2+8x^5-12x^3求:f(x)÷(-5x^2)和f(x)×(x^2-1)的值

f(x)÷(-5x^2)=(10x^2+8x^5-12x^3)÷(-5x^2)=-2-5x^3/5+12x/5f(x)×(x^2-1)=(10x^2+8x^5-12x^3)(x^2-1)=10x^4-10x^2+8x^7-8x^5-12x^5+12x^3=10x^4-10x^2+8x^7-20x^5+12x^3