If -x - 2 = 9, we can solve for x by first adding 2 to both sides:
-x - 2 + 2 = 9 + 2
-x = 11.
Next, multiply both sides by -1 to remove the negative and solve for x.
-(-x) = -11
x = -11.
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Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
x=-1
3 (which is the sqrt of 9)
x2 - 4x - 9 = 0 ∴ x2 - 4x = 9 ∴ x2 - 4x + 4 = 13 ∴ (x - 2)2 = 13 ∴ x - 2 = ±√13 ∴ x = 2 ± √13