Mathematics · Algebra

Write the expanded form of (7a + 9b + 4c)2.

Verified Solution4 OptionsUpdated: October 2026👁️1 View

149a2 + 81b2 + 16c2 + 126ab + 72bc + 56ac✓
249a2 + 81b2 + 16c2 + 126ab + 72bc + 66ac
349a2 + 81b2 + 16c2 + 126ab + 67bc + 56ac
449a2 + 81b2 + 16c2 + 130ab + 72bc + 56ac

Correct answer

49a2 + 81b2 + 16c2 + 126ab + 72bc + 56ac

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Write the expanded form of (7a + 9b + 4c)2.

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