x=-x^2-9

Simple and best practice solution for x=-x^2-9 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for x=-x^2-9 equation:


Simplifying
x = -1x2 + -9

Reorder the terms:
x = -9 + -1x2

Solving
x = -9 + -1x2

Solving for variable 'x'.

Reorder the terms:
9 + x + x2 = -9 + -1x2 + 9 + x2

Reorder the terms:
9 + x + x2 = -9 + 9 + -1x2 + x2

Combine like terms: -9 + 9 = 0
9 + x + x2 = 0 + -1x2 + x2
9 + x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
9 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + x + -9 + x2 = 0 + -9

Reorder the terms:
9 + -9 + x + x2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + x + x2 = 0 + -9
x + x2 = 0 + -9

Combine like terms: 0 + -9 = -9
x + x2 = -9

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = -9 + 0.25

Reorder the terms:
0.25 + x + x2 = -9 + 0.25

Combine like terms: -9 + 0.25 = -8.75
0.25 + x + x2 = -8.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -8.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| -12n+32n+68=88 | | -70+x=2-2x | | 0.142857(14-7p-2)=2(0.5p+3)+6 | | -74-62n=-136 | | p=2*65+2*78 | | -5x+7-12x=211 | | 12+3y=9x | | 3n=5x-11 | | 45-125=-8n | | 3x-7=24 | | x=3x^2 | | -97+16n=-129 | | 15b^2-5b-50=0 | | 14(x+3)-11(x-2)=80 | | -218=6n+10 | | 12X^2-32X=-21 | | w/18--906=934 | | 14+-87n=101 | | -44+8= | | 157=x+(5x-1) | | y=270+.60y | | 14+-87n=102 | | y=510+.60y | | ln(4x+25)=4 | | n+x=15 | | 11n-(-6n)=-136 | | -5x^4= | | y=660+.60y | | 47-6n=107 | | 9(3d-4)= | | x+(x+475000)=550000000 | | y=390+.60y |

Equations solver categories