If a +b+c =12 and a² +b²+ c² = 50, find ab + bc + ca.
please guys, it's urgent, I hv test right now, help me to solve it
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If a +b+c =12 and a² +b²+ c² = 50, find ab + bc + ca.
please guys, it's urgent, I hv test right now, help me to solve it
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