-3+x^2=5x-21

Simple and best practice solution for -3+x^2=5x-21 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 -3+x^2=5x-21 equation:


Simplifying
-3 + x2 = 5x + -21

Reorder the terms:
-3 + x2 = -21 + 5x

Solving
-3 + x2 = -21 + 5x

Solving for variable 'x'.

Reorder the terms:
-3 + 21 + -5x + x2 = -21 + 5x + 21 + -5x

Combine like terms: -3 + 21 = 18
18 + -5x + x2 = -21 + 5x + 21 + -5x

Reorder the terms:
18 + -5x + x2 = -21 + 21 + 5x + -5x

Combine like terms: -21 + 21 = 0
18 + -5x + x2 = 0 + 5x + -5x
18 + -5x + x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
18 + -5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -5x + -18 + x2 = 0 + -18

Reorder the terms:
18 + -18 + -5x + x2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -5x + x2 = 0 + -18
-5x + x2 = 0 + -18

Combine like terms: 0 + -18 = -18
-5x + x2 = -18

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -18 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -18 + 6.25

Combine like terms: -18 + 6.25 = -11.75
6.25 + -5x + x2 = -11.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = -11.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 23/69=2/x | | 3b/4a^2 | | 5+4n+3n=-2 | | 4y=y+21 | | -12=4+4x | | m=-5/7 | | -5=2+7n | | 3x+3y=-78 | | -18x=-6x | | -2a=22 | | -5.5h-7.5h=26.5 | | 2+3n+4n=-12 | | -9-6x-3=-18 | | 5n+3=2n+4+-3n | | 5/c-7c/4 | | 3=n+3-1n | | (6x-1)+(7x+1)=180 | | -23-x=158 | | d+-2s+2=0 | | 2w^2+0.279w-0.0467=0 | | 3x+x=480 | | 3x-9-3x=0 | | 18x^2+24=0 | | x^2-y^2+16=0 | | 11=4-4n-3n | | x+53+x=803 | | 0.75c=24 | | 5z-12-2z=-40-8z-9 | | z+2+x=10 | | 2180000=-200r^2+92000r-840000 | | 1+2n+3n=11 | | 48=9x+12 |

Equations solver categories