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a+b = 30 and ab = 48 then by substitutiuon
a(30-a) = 48
a2 - 30a + 48 = 0
use the quadratic formula
a = (30 +/- sq rt(900 - 192))/2
a = 15 +/- sqrt (177)
so the 2 numbers are (15 + sqrt 177) and (15 - sqrt 177)
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