Question

[Le Yen Ngoc]

M(x)\(=3x^3+2x^2_{ }-7x+3x^2-x^3+6\)

N(x)\(=3+4x^3+6x^2+3x-x^2-2x^3\)

a) thu gon da thuc M(x),  N(x)

b)tinh M(x)+N(x)

Answer 1

[Cao Thị Thánh Mỹ 2003]

M(x): 4x3 + 5x2-7x +6 N(x): 2x3+5x2+3x+3 M(x)+N(x): 6x3+10x2-4x+9