Question

负2的2003次方+负2的2002次方=?

Answer 1

(1) (-2)^2003+(-2)^2002

=(-2)^2003+2^2002

=-2^2003+2^2002

=2^2002x(-2)+2^2002

=2^2002x(-2+1)

=-2^2002

(2) (-0.25)^2009x4^2008

=(-0.25^2009x4^2008

=-(0.25^2009x4^2008)

=-(0.25x4)^2008x0.25

=-(1^2008)x0.25

= -0.25