Question 1150171
You can think about it for a few seconds and find they're 2 & 5.
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Or, try to make it a Master's Thesis:
x*(7 - x) = 10
7x - x^2 = 10
x^2 - 7x + 10 = 0  ----- At this point, you have to think about and see they're 2 & 5.  Why add the extra steps?  If they are not integers, this would be necessary.

(x-2)*(x-5) = 0
---> 2 & 5
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If the numbers are not integers, the steps would be necessary.