Mathematics, 18.03.2021 01:00 Eric0393nsuh
If ab = 9 and a² + b² = 81, then (a+b)² = ?
Answers: 3
, and we almost have a 2ab in the equation 
. To get that 2ab, we can simply double both sides of the first equation to get 
. From there, we'll add the first two equations together, giving us the summed equation
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If ab = 9 and a² + b² = 81, then (a+b)² = ?...
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