((3-x)分之x+3)+(x方+6x+9)分之(x方-9)

((3-x)分之x+3)+(x方+6x+9)分之(x方-9)


((3-x)分之x+3)+(x方+6x+9)分之(x方-9)
=(3-x)/(x+3)+(x+3)^2/(x-3)(x+3)
=(3-x+x+3)/(x+3)
=6/(x+3)



求2x^4-3x^3-x^2+5x+6除以X+1所得的商式和餘式
謝謝


2x^4-3x^3-x^2+5x+6
=2X^3(X+1)-5X^3-X^2+5X+6
=2X^3(X+1)-5X^2(X+1)+4X^2+5X+6
=2X^3(X+1)-5X^2(X+1)+4X(X+1)+(X+1)+5
=(2X^3-5X^2+4X+1)(X+1)+5
商式2X^3-5X^2+4X+1
餘5