x^2-5=-3x

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


Simplifying
x2 + -5 = -3x

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

Solving
-5 + x2 = -3x

Solving for variable 'x'.

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

Combine like terms: -3x + 3x = 0
-5 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + 3x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + 3x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 3x + x2 = 0 + 5
3x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
3x + x2 = 5

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 5 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 5 + 2.25

Combine like terms: 5 + 2.25 = 7.25
2.25 + 3x + x2 = 7.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 7.25

Calculate the square root of the right side: 2.692582404

Break this problem into two subproblems by setting 
(x + 1.5) equal to 2.692582404 and -2.692582404.

Subproblem 1

x + 1.5 = 2.692582404 Simplifying x + 1.5 = 2.692582404 Reorder the terms: 1.5 + x = 2.692582404 Solving 1.5 + x = 2.692582404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 2.692582404 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 2.692582404 + -1.5 x = 2.692582404 + -1.5 Combine like terms: 2.692582404 + -1.5 = 1.192582404 x = 1.192582404 Simplifying x = 1.192582404

Subproblem 2

x + 1.5 = -2.692582404 Simplifying x + 1.5 = -2.692582404 Reorder the terms: 1.5 + x = -2.692582404 Solving 1.5 + x = -2.692582404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -2.692582404 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -2.692582404 + -1.5 x = -2.692582404 + -1.5 Combine like terms: -2.692582404 + -1.5 = -4.192582404 x = -4.192582404 Simplifying x = -4.192582404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.192582404, -4.192582404}

See similar equations:

| 2x+15=32-2 | | 4y+y+7-1= | | 0.09xX=50.98 | | -x^2-10x-19=-2x-3 | | 7(4s+9)=399 | | 420=(r+10) | | 2x+(x+5)+(x-2)=13 | | (2x+17)+127=80 | | x^2-(x^2+4x+4)-36=0 | | 10=-5/6(-12) | | 22/x=6/21 | | 21+(2x+29)=180 | | 17x-11y+18=0 | | 0.09xX=108.73 | | 135-76= | | 3a-0-1=1 | | 1500=300/x | | (2x-9)+25=180 | | -12x=-3+x | | xsquared-10x-11=-7x-1 | | 4.5+x=9.5 | | 6y+3y+2= | | 0.09xX=60.66 | | 3+3(6u-6)=-3(2u-1)+8u | | 10x-15=6x-4 | | 4/5=x/56 | | 10y+70=2y+16+7 | | 13-3x=15x+4 | | 0.09xX=79.99 | | 7(3n+4)=8(9n+4)+1 | | 0.5x+0.4=0.7x-0.8 | | 3c-11=2 |

Equations solver categories