x^2+20=-8x

Simple and best practice solution for x^2+20=-8x 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+20=-8x equation:


Simplifying
x2 + 20 = -8x

Reorder the terms:
20 + x2 = -8x

Solving
20 + x2 = -8x

Solving for variable 'x'.

Reorder the terms:
20 + 8x + x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
20 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + 8x + -20 + x2 = 0 + -20

Reorder the terms:
20 + -20 + 8x + x2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + 8x + x2 = 0 + -20
8x + x2 = 0 + -20

Combine like terms: 0 + -20 = -20
8x + x2 = -20

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -20 + 16

Reorder the terms:
16 + 8x + x2 = -20 + 16

Combine like terms: -20 + 16 = -4
16 + 8x + x2 = -4

Factor a perfect square on the left side:
(x + 4)(x + 4) = -4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 9=4x-12 | | 10y+34X=16.5 | | 5x^2-28xy-12y^2=0 | | 64x^2-16x+1= | | 12x+16y-136=0 | | x^2+23x=50 | | 4(3x+4y-34)=0 | | 23x-6+4x^2=0 | | 15x^2+16xy+4y^2=0 | | 20x^5+5x=0 | | 36x-96+12x=12x+32+24 | | 1x+1-3=1x+3-1x | | 5z^5(10-z^3)= | | 2x-39=15x-89 | | 2(3x-4)=6x+5 | | 20x-39=59x-89 | | 2.5x+15+0.5(x-4)=1.2x+2(.9x-6) | | (5y^2-2y-4)+(3y^2-7y+1)= | | 4x^2-23xy+15y^2=0 | | -7(1-4m)=13(2m)-3 | | -x^2+4x+12= | | 7x+8y=11 | | 20y^2+3y+8= | | 2+6y=3x+6 | | 7-2=q | | 4X+25+5=0 | | 1-9+(-x)=-1x+(-6) | | 2(x)2-5(x)-4=0 | | 18x^2+30x-300= | | 9x+4y+(-4y)+(-11x)= | | 6-3(3x-5)=-15 | | 8y^2+25+3= |

Equations solver categories