x is a natural number .
a) What number should be added to x
2
+ 16 x to get a perfect square ?
b) If x
2
+ 16 x = 36 , find the natural number represented by x ?
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a - We must divide 16 in the equation , and raise it to the power of 2. Therefore the answer is 64.
b - x = 36-16 = 20
20 is a natural number
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