Question

6x^n+1-14x^n+8x^n-1,(x+3)^2-2(x+3)-8与

Answer 1

1:

6x^2+x-22=0

1 2

6 -11

(x+2)(6x-11)=0

x=-2

x=11/6

2:

abc^2+abd^2+a^2cd+b^2cd

=abc^2+a^2cd+abd^2+b^2cd

=ac(bc+ad)+bd(ad+bc)

=(ad+bc)(ac+bd)