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Anonymous
It is a quadratic equation in X, with two real roots.
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X=-3
It also equals 13 12.
133
Using the discriminant for a quadratic equation the value of k works out as plus or minus 12.
b = sqrt32 or 4 root 2
X = √63
4 squared minus 2 squared equals 12
a2 + 62 = 122 a2 + 62 - 62 = 122 - 62 a2 = 144 - 36 a2 = 108 taking the square root of each side, we get a equal plus or minus the square root of 108, or plus or minus 6 times the square root of 3.
5 or 12
6
92
I'll do ya one better - 12 plus 8 equals what?