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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
=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
1年前
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你能帮帮他们吗