Question

  làm giúp e f(x) - g(x) vs ạ 

Answer 1

\(f\left(x\right)-g\left(x\right)\)

\(=\left(10x^7-8x^5-6x^3+4x+\dfrac{1}{4}\right)-\left(9x^8-7x^6-5x^4+3x^2+\dfrac{3}{4}\right)\)

\(=10x^7-8x^5-6x^3+4x+\dfrac{1}{4}-9x^8+7x^6+5x^4-3x^2-\dfrac{3}{4}\)

\(=-9x^8+10x^7+7x^6-8x^5+5x^4-6x^3-3x^2+4x+\left(\dfrac{1}{4}-\dfrac{3}{4}\right)\)

\(=-9x^8+10x^7+7x^6-8x^5+5x^4-6x^3-3x^2+4x-\dfrac{1}{2}\)