use the suitable identity to get the product, (-a+c) (-a+c)
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(c-a)(c-a)
(c-a)*
I think it
(c-a)*
I think it
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10
( _a+c)^2
(a+b)^2=a^2 +b^2×2ab
following this identity
a^2+c^2 _2ac
(a+b)^2=a^2 +b^2×2ab
following this identity
a^2+c^2 _2ac
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