if a+b+c=7 and ab+bc+ca=20 find the value of (a+b+c)whole power 2
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we can solve these by substituting the value of
(a+b+c)=7
=(a+b+c)²
=(7)²
=49
(a+b+c)=7
=(a+b+c)²
=(7)²
=49
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