多项式8x-x^4和x^5-16x和x^4-4x^3+4x^2的公因式是:
问题描述:
多项式8x-x^4和x^5-16x和x^4-4x^3+4x^2的公因式是:
答
8x-x^4=-x(x³-8)=-x(x-2)(x²-2x+4)
x^5-16x=x(x^4-16)=x(x²+4)(x²-4)=x(x²+4)(x+2)(x-2)
x^4-4x^3+4x^2=x²(x-2)²
∴多项式8x-x^4和x^5-16x和x^4-4x^3+4x^2的公因式是x(x-2)
答
8x-x^4=x(8-x³)=x(2-x)(4+2x+x²)=-x(x-2)(4+2x+x²)x^5-16x=x(x^4-16)=x(x²-4)(x²+4)=x(x-2)(x+2)(x²+4)x^4-4x^3+4x^2=x²(x²-4x+4)=x²(x-2)²公因式是:x(x-2)...