(a+b-c)(a-b+c)+(b+c)² 的解?
3个回答
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这不是方程啊?也不是不等式
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(a+b-cXa-b+c)+(b+c)F
=[a +(b-c)[a-(b-c)]+(b+c)=a2-(b-c)F +(b+c}
=a2 +[(b+c)*-(b-c)]
= a2 +[(b+c)+(b- c)[(b+c)-(b-c)]=a2+ 2b.2c
=a2+ 4bc
=[a +(b-c)[a-(b-c)]+(b+c)=a2-(b-c)F +(b+c}
=a2 +[(b+c)*-(b-c)]
= a2 +[(b+c)+(b- c)[(b+c)-(b-c)]=a2+ 2b.2c
=a2+ 4bc
追答
(a+b-cXa-b+c)+(b+c)2
=[a +(b-c)[a-(b-c)]+(b+c)=a2-(b-c)F +(b+c}
=a2 +[(b+c)*-(b-c)]
= a2 +[(b+c)+(b- c)[(b+c)-(b-c)]=a2+ 2b.2c
=a2+ 4bc
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