Question

x is a natural number.
(a)
What number should be added to x2 + 2x to get a perfect square?
(b) If x2 + 2x = 15. Find the natural number represented by x.​

Answer 1

Answer:

the answer is the image below

Step-by-step explanation:

Answer 2

Step-by-step explanation:

x²+2x= 15

x³=15-2

x³=13

x=√13