The numbers are (1/2)(5 + i root(15)) and (1/2)(5 - i root(15))Note: You can get this from the Wolfram Alpha site, using the input:
a+b=5, ab=10
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The numbers are the complex conjugate pair 2.5 +/- 1.9365 i where i is the imaginary square root of -1.
-19
7.5516 and 70.4484 (approx)
-1
The two numbers you are looking for are 48 and -28. When multiplied together, 48 × -28 equals -1344, and when added, 48 + (-28) equals 20.
49