Question
If $m - n = 0.9$ and $mn = 0.36,$ find$:m^2 - n^2.$
✓
Answer
$m^2 - n^2$
$= (m + n)(m - n)$
$= (±1.5)(0.9)$
$= ±1.35.$
$= (m + n)(m - n)$
$= (±1.5)(0.9)$
$= ±1.35.$
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