Answer:
25
Step-by-step explanation:
The number that needs to be added is the square of half the x-coefficient:
(-10/2)^2 = 25
_____
Adding that gives ...
(x -5)^2 = 32
x = 5 ± 4√2
30$ sales tax, 460$ Total
7% of 430 is 30.1, after rounding it’s 30, and 430 plus 30 is 460.
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