-x^2-4x-5=0

Simple and best practice solution for -x^2-4x-5=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^2-4x-5=0 equation:


Simplifying
-1x2 + -4x + -5 = 0

Reorder the terms:
-5 + -4x + -1x2 = 0

Solving
-5 + -4x + -1x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(5 + 4x + x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(5 + 4x + x2)' equal to zero and attempt to solve: Simplifying 5 + 4x + x2 = 0 Solving 5 + 4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-5' to each side of the equation. 5 + 4x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + 4x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4x + x2 = 0 + -5 4x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 4x + x2 = -5 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = -5 + 4 Reorder the terms: 4 + 4x + x2 = -5 + 4 Combine like terms: -5 + 4 = -1 4 + 4x + x2 = -1 Factor a perfect square on the left side: (x + 2)(x + 2) = -1 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

See similar equations:

| 4x^2+16x+7x=0 | | 2m+-4m=28m | | 78x=4368 | | x-11=23 | | 4z+6=-2 | | x+(x+4)+(x+4)+(x+4)=188 | | 7-8x=43-15x | | x^2-8x+22=7 | | -1,2y-1=-4,6 | | 8-5a+7-a=9 | | 6s-12=2(s+2) | | 12-3x=5x-4 | | 3x+5=3x+9 | | x^2+9x+8=x | | 4x+17=2y-12 | | 2y-11=17 | | -2^-4/((-4^-1)^2)^0 | | 0,4x-2=1,6 | | 4(1/3x-9)=1/2(x-7) | | X-1/4(2k+15)=3/4 | | 1.5g-1.1=4.9 | | 10m-2/5=9/35 | | 1/3-3=5 | | 22x+27=-33x-10 | | x^(-1/4)=0.2 | | -3=x/2+7 | | 5+d/4=12 | | (25b-5)-6(4b+1)=-3 | | 2/3x-3=6+1/3x | | 7t+-6=-104 | | 8x+4x+3+8=4x+3+7x | | (6x*x)-17x-28=0 |

Equations solver categories