x^2 +9 =x^2 -9
9=-9
No solution
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It is a quadratic equation and its solutions are: x = 4 or x = -9
Using the discriminant for a quadratic equation the value of k works out as plus or minus 12.
44
5. Just do 9 minus 4. 5 plus 4 equals 9
8M - 4M - 6 - 3 + 5M = 82 - 1 9M - 9 = 64 - 1 9M - 9 = 63 9M - 9 +9 = 63 + 9 9M = 72 9M/9 = 72/9 M = 8