Question 683404
FOIL
{{{(1+3sqrt(-5))(2-sqrt(-5))}}}
...
{{{1(2) + 1(-sqrt(-5)) + 3sqrt(-5)(2) + 3sqrt(-5)(-sqrt(-5))}}}
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{{{2  - sqrt(-5) + 6sqrt(-5) - 3sqrt(-5)^2}}}
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{{{2 + 5sqrt(-5) - 3(-5)}}}
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{{{2 + 5sqrt(-5) + 15}}}
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{{{17 + 5sqrt(-5)}}}
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{{{17 + 5sqrt(-1*5)}}}
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{{{highlight_green(17 + 5i*sqrt(5))}}}
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