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Please help me i don’t even know where to start!

Please help me i don’t even know where to start!-example-1
User Avi L
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1 Answer

13 votes
13 votes

Answer:

b² + c² = 47

Explanation:

Expand (b + c)² = 61

⇒ (b + c)(b + c) = 61

⇒ b² + 2bc + c² = 61

Substitute bc = 7 into b² + 2bc + c² = 61:

b² + 2(7) + c² = 61

b² + 14 + c² = 61

To determine b² + c² simply subtract 14 from both sides of the equation:

b² + c² = 47

User Cubby
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