Question

4q(1-q)的立方+2(p-1)的平方 (x-y）的4次方+x(x-y)的立方+y(y-x）的立方

Answer 1

原式=4q(1-q)³+2(1-p)²

=2(1-p)²[2(1-p)+1]

=2(1-p)²(3-2p)

原式= (x-y）⁴+x(x-y)³-y(x-y)³

=(x-y)³[(x-y)+x-y]

=2(x-y)³(x-y)

=2(x-y)⁴