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:

a)x=4

4×2+4×2=16

16 is a perfect square (4×4=16)

b)x=15/4

x2+2x=15

4x=15

x=15/4