x^2+12x+99=0

Simple and best practice solution for x^2+12x+99=0 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^2+12x+99=0 equation:


Simplifying
x2 + 12x + 99 = 0

Reorder the terms:
99 + 12x + x2 = 0

Solving
99 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-99' to each side of the equation.
99 + 12x + -99 + x2 = 0 + -99

Reorder the terms:
99 + -99 + 12x + x2 = 0 + -99

Combine like terms: 99 + -99 = 0
0 + 12x + x2 = 0 + -99
12x + x2 = 0 + -99

Combine like terms: 0 + -99 = -99
12x + x2 = -99

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = -99 + 36

Reorder the terms:
36 + 12x + x2 = -99 + 36

Combine like terms: -99 + 36 = -63
36 + 12x + x2 = -63

Factor a perfect square on the left side:
(x + 6)(x + 6) = -63

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 128x^2+16x-14=0 | | 36=t+6t | | 3n-8=29+2n | | (4+x)(3-x)=-x(x+7) | | 24=5b-9-2b | | 25-2x=19 | | 2t^2+6t+1=0 | | d+2/4=3 | | 7x-4(6-x)+3(x+1)=-7 | | -24+6k=-6(6-2k) | | 36x^2-61x+25=0 | | 21d-3d+13=85 | | 3(x+2)-5=7x-8 | | 5x=-12x+7 | | 89v+(-75v)+(-74v)=-60 | | -3x-10+2x=6 | | 7(d-80)=98 | | [8(x+4)-18]-[4(x-5)+7]= | | 14q-9q+3q=8 | | 6x-5(3+x)=2x-1 | | 13+5x=38 | | 6x-5(3+x)=2x-2 | | -6-7x=3x-86 | | 14b+b-6b+b-4=16 | | 3m+m-2m=10 | | 7=2(t+1)-13 | | -4=-b-18 | | 10g-8g=20 | | 2(x+9)-3(x+6)=-9(x+16) | | x+15=26 | | -7g+8g-11g-(-19)=-11 | | 2(w+1)=8 |

Equations solver categories