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x = ±3i

Q: What is the answer to x2 equals -9?

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Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..

x=-1

x2 - 4x - 9 = 0 ∴ x2 - 4x = 9 ∴ x2 - 4x + 4 = 13 ∴ (x - 2)2 = 13 ∴ x - 2 = ±√13 ∴ x = 2 ± √13

3 (which is the sqrt of 9)

x2-7x-18 (x-9) (x+2) x=9 x=-2 X= either 9 or -2

Related questions

If: x2 = 81 Then: x = 9 or x = -9

x2 + 9 = 10x x2 - 10x + 9 = 0. (x - 9)(x - 1) = 0. Therefore, x = 1 or 9.

X2 or 2 times x?

x2 - 9 = 0Add 9 to both sides.x2 = 9Find the square root of both sides.x = ±3

Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..

9

x=-1

x2+24x+144 = 9 x2+24x+144-9 = 0 x2+24x+135 = 0 (x+9)(x+15) = 0 x = -9 or x = -15

x2 = 81 Square root both sides:- x = +/- 9

3

In the equation x2 = 6x - 9, all terms must be moved to one side of the equals sign, giving x2 - 6x + 9 = 0. This becomes factorable to (x -3)(x-3).

Divide both sides of the equation by x: x2 = 9x x2 / x = 9x / x x = 9