It's an equation in 'N' ... about the simplest one you could write.
The solution of that equation is: N=0 .
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-5 -15n = 10add 5 to both sides-15n = 15divide both sides by -15n = -1
when n = 0 it equals -25 when n = 1 it equals -36 when n = 2 it equals -39 etc
n - 15 = 86n = 86 + 15n = 101
n3 + 2n2 - 15n = 0 : extract n as a factor of all the left hand terms then, n(n2 + 2n - 15) = 0 : the expression n2 + 2n - 15 can be factored as (n + 5)(n - 3) then, n(n + 5)(n - 3) = 0 : This holds true when either n = 0, or n + 5 = 0 or n - 3 = 0 When n + 5 = 0 then n = -5 : When n - 3 = 0 then n = 3. The solutions are n = 0 or n = -5 or n = 3.
you wanna find out 15n=1275 you have to find out what times what equals 1275 alright =) by a fifth grader Majd Merai =) i rock hehehe