(n-2)x180
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n2 = 20 + n so n2 - n - 20 = 0 that is (n - 5)(n + 4) = 0 so that n - 5 = 0 or n + 4 = 0 n = 5 or n = -4
3 MgCl2 + N2 = Mg3N2 + 3 Cl2
If: n2 = 19 Then: n = the square root of 19.
n2 + 9n + 18 = (n + 6)(n + 3)
I'm assuming you meant m2-n2+196 m2-n2=-196 m2=-196+n2 m=14i+n n=m-14i