5x^2+9=-x+8

Simple and best practice solution for 5x^2+9=-x+8 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 5x^2+9=-x+8 equation:


Simplifying
5x2 + 9 = -1x + 8

Reorder the terms:
9 + 5x2 = -1x + 8

Reorder the terms:
9 + 5x2 = 8 + -1x

Solving
9 + 5x2 = 8 + -1x

Solving for variable 'x'.

Reorder the terms:
9 + -8 + x + 5x2 = 8 + -1x + -8 + x

Combine like terms: 9 + -8 = 1
1 + x + 5x2 = 8 + -1x + -8 + x

Reorder the terms:
1 + x + 5x2 = 8 + -8 + -1x + x

Combine like terms: 8 + -8 = 0
1 + x + 5x2 = 0 + -1x + x
1 + x + 5x2 = -1x + x

Combine like terms: -1x + x = 0
1 + x + 5x2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
0.2 + 0.2x + x2 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + 0.2x + -0.2 + x2 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + 0.2x + x2 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + 0.2x + x2 = 0 + -0.2
0.2x + x2 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
0.2x + x2 = -0.2

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.2x + 0.25 + x2 = -0.2 + 0.25

Reorder the terms:
0.25 + 0.2x + x2 = -0.2 + 0.25

Combine like terms: -0.2 + 0.25 = 0.05
0.25 + 0.2x + x2 = 0.05

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.05

Calculate the square root of the right side: 0.223606798

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.223606798 and -0.223606798.

Subproblem 1

x + 0.5 = 0.223606798 Simplifying x + 0.5 = 0.223606798 Reorder the terms: 0.5 + x = 0.223606798 Solving 0.5 + x = 0.223606798 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.223606798 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.223606798 + -0.5 x = 0.223606798 + -0.5 Combine like terms: 0.223606798 + -0.5 = -0.276393202 x = -0.276393202 Simplifying x = -0.276393202

Subproblem 2

x + 0.5 = -0.223606798 Simplifying x + 0.5 = -0.223606798 Reorder the terms: 0.5 + x = -0.223606798 Solving 0.5 + x = -0.223606798 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.223606798 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.223606798 + -0.5 x = -0.223606798 + -0.5 Combine like terms: -0.223606798 + -0.5 = -0.723606798 x = -0.723606798 Simplifying x = -0.723606798

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.276393202, -0.723606798}

See similar equations:

| 12-6x=-8x-5 | | 2[x]=18 | | 6h+24=9 | | 21x+13+14x=180 | | 7x+y=28 | | 7(m+1)=4(3m+6) | | -20y+50+25=500 | | X^2+3=2x^2-5x | | x^4-22x^2-50=0 | | A+136-38=302 | | 3b+8=9b-7 | | 4y-35=-3y | | x+40=126 | | 5r^2-16r=16 | | 17-(4-6m)=37 | | -5y+6=4y+3 | | .75c=12 | | 4y+7=a+32 | | 3+7=2y+3y | | 9-5z=-8z | | -4x^2-8x-3=-3-5x | | 2y-4x+3= | | -5a-24=3a | | 6x=20x | | 7x+2(y-3x)= | | 9=[x-5] | | 7x-(2x+12)=11x | | 4m+5=8m-3+m | | 4x+6-27=15 | | (m-12)3= | | -400-9y=11y | | -1-3/8= |

Equations solver categories