Question

Answer 1

giúp với ạ

Answer 2

A(x)=1/2x^5-3x^4+2/9x^3+x^2-1/8

B(x)=4x^5-1/2x^4-0,5x^3-2/3x^2-x+1/2

C(x)=x^4-5x^3+2x^2-3/4x+5

a: A(x)+B(x)

=1/2x^5-3x^4+2/9x^3+x^2-1/8+4x^5-1/2x^4-0,5x^3-2/3x^2-x+1/2

=9/2x^5-3,5x^4-5/18x^3+1/3x^2-x+3/8

b: B(x)+C(x)

=4x^5-1/2x^4-0,5x^3-2/3x^2-x+1/2+x^4-5x^3+2x^2-3/4x+5

=4x^5+1/2x^4-5,5x^3+4/3x^2-7/4x+11/2

e: A(x)-B(x)-C(x)

=1/2x^5-3x^4+2/9x^3+x^2-1/8-4x^5-1/2x^4+5,5x^3-4/3x^2+7/4x-11/2

=-7/2x^5-3,5x^4+103/18x^3-1/3x^2+7/4x-45/8

c: C(x)+A(x)

=1/2x^5-3x^4+2/9x^3+x^2-1/8+x^4-5x^3+2x^2-3/4x+5

=1/2x^5-2x^4-43/9x^3+3x^2-3/4x+39/8