If bc+ca-ab = 125 & a^2 +b^2 +c^2 = 314, then value of a+b-c is?
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Answered by
19
Answer:
a+b-c = √64 = 8.
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Answered by
2
Answer:
8
Explanation:
bc+ca-ab = -(-bc-ca+ab) = 125
{a+b+(-c)}^2 =a^2 +b^2 +c^2 +2(ab-bc-ca)
= 314+2(-125)
= 64
a+b-c = √64 = 8
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