计算 (-2m-1)(-2m-1) (4x-3m)(4x-3m) (1.5a-2/3b)(1.5a-2/3b)

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计算 (-2m-1)(-2m-1) (4x-3m)(4x-3m) (1.5a-2/3b)(1.5a-2/3b)
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计算 (-2m-1)(-2m-1) (4x-3m)(4x-3m) (1.5a-2/3b)(1.5a-2/3b)
计算 (-2m-1)(-2m-1) (4x-3m)(4x-3m) (1.5a-2/3b)(1.5a-2/3b)

计算 (-2m-1)(-2m-1) (4x-3m)(4x-3m) (1.5a-2/3b)(1.5a-2/3b)
(-2m-1)(-2m-1)
=(2m+1)^2
=4m^2+4m+1
(4x-3m)(4x-3m)
=(4x-3m)^2
=16x^2-24mx+9m^2
(1.5a-2/3b)(1.5a-2/3b)
=(1.5a-2/3b)^2
=2.25a^2-2ab+4/9b^2

 

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