Mathematics · Algebra

If a2 + b2 + c2 + 189 = 6(a + 4b + 2c), then √(ab + bc + ca) is equal to:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

13√14✓
23√11
32√14
42√11

Correct answer

3√14

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If a2 + b2 + c2 + 189 = 6(a + 4b + 2c), then √(ab + bc + ca) is equal to:

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If a2 + b2 + c2 + 189 = 6(a + 4b + 2c), then √(ab + bc + ca) is equal to:

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