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
1774cm
Explanation:
11x14=154
20x9x9=1620
154+1620=1774
the answers 1, 4, and 5.
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