SOLUTION: what is the real part of the standard form of the expression (5+i)(10-i)

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Question 239174: what is the real part of the standard form of the expression (5+i)(10-i)
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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(5+i)(10-i)
FOIL this
50 - 5i + 10i -i^2
:
50 + 5i - (-1)
:
50 + 5i + 1
which is
51 + 5i
:
51 is the real part