ab-1/2(a+b)^2+1/8c^2因式分解!
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ab-1/2(a+b)^2+1/8c^2因式分解!
ab-1/2(a+b)^2+1/8c^2因式分解!
ab-1/2(a+b)^2+1/8c^2因式分解!
ab-1/2(a+b)^2+1/8c^2 =c^2/8-1/2(a^2-2ab+b^2) =1/2(c^2/4-(a-b)^2) =1/2(c/2+(a-b))(c/2-(a-b)) =1/2(c/2+a-b)(c/2-a+b)