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The question's attached in the file; I tried solving it in 4 different ways and ended up confusing myself more and more each time.

The Questions Attached In The File I Tried Solving It In 4 Different Ways And Ended Up Confusing Myself More And More Each Time class=

Sagot :

(x+3)² = (16+x-3) (x-3)

x²+6x+9=(x+13)(x-3)

x²+6x+9=x²+10x-39

6x-10x=-39-9

-4x=-48

x = 12

=> NM = 12+3 = 15