x^2+8x=3x^2+5

Simple and best practice solution for x^2+8x=3x^2+5 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+8x=3x^2+5 equation:


Simplifying
x2 + 8x = 3x2 + 5

Reorder the terms:
8x + x2 = 3x2 + 5

Reorder the terms:
8x + x2 = 5 + 3x2

Solving
8x + x2 = 5 + 3x2

Solving for variable 'x'.

Reorder the terms:
-5 + 8x + x2 + -3x2 = 5 + 3x2 + -5 + -3x2

Combine like terms: x2 + -3x2 = -2x2
-5 + 8x + -2x2 = 5 + 3x2 + -5 + -3x2

Reorder the terms:
-5 + 8x + -2x2 = 5 + -5 + 3x2 + -3x2

Combine like terms: 5 + -5 = 0
-5 + 8x + -2x2 = 0 + 3x2 + -3x2
-5 + 8x + -2x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-5 + 8x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
2.5 + -4x + x2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + -4x + -2.5 + x2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + -4x + x2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -4x + x2 = 0 + -2.5
-4x + x2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
-4x + x2 = -2.5

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 = -2.5 + 4

Reorder the terms:
4 + -4x + x2 = -2.5 + 4

Combine like terms: -2.5 + 4 = 1.5
4 + -4x + x2 = 1.5

Factor a perfect square on the left side:
(x + -2)(x + -2) = 1.5

Calculate the square root of the right side: 1.224744871

Break this problem into two subproblems by setting 
(x + -2) equal to 1.224744871 and -1.224744871.

Subproblem 1

x + -2 = 1.224744871 Simplifying x + -2 = 1.224744871 Reorder the terms: -2 + x = 1.224744871 Solving -2 + x = 1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 1.224744871 + 2 Combine like terms: -2 + 2 = 0 0 + x = 1.224744871 + 2 x = 1.224744871 + 2 Combine like terms: 1.224744871 + 2 = 3.224744871 x = 3.224744871 Simplifying x = 3.224744871

Subproblem 2

x + -2 = -1.224744871 Simplifying x + -2 = -1.224744871 Reorder the terms: -2 + x = -1.224744871 Solving -2 + x = -1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -1.224744871 + 2 Combine like terms: -2 + 2 = 0 0 + x = -1.224744871 + 2 x = -1.224744871 + 2 Combine like terms: -1.224744871 + 2 = 0.775255129 x = 0.775255129 Simplifying x = 0.775255129

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.224744871, 0.775255129}

See similar equations:

| 025t^2-0.16=0 | | 2(x+9)=9x+8-7x+10 | | -100(v+2300)=-800 | | x^2+32x+60= | | 0.3(x-2)+0.4x=-0.2(x-6) | | 15/8*32/3 | | 15/8/3/32 | | 2k+3=2k+1 | | x/3-x/6+3=x+3 | | 8v^6+28v^5+20v^4=v^4(8v^2+28v+20) | | -2x+2x*4=-2 | | 3(2m-1)-5m=-1 | | 12x^5-3x+9/3x | | 2x^2-74x+12=0 | | 7x-2=3+2x | | 3t+(9+2)-1=75 | | 3x-8=5-2x | | 9x^2+30x=10 | | 2(3x-1)=15 | | 7/3t-2=19+5t | | 0.4(x+9)=12 | | 15-x/4=12 | | 186*61/62*2/9 | | 5(14)+36=6n-1 | | -3y+5=-1 | | 7/3-2=19+5t | | -x-1/5=x+1/6+2/5 | | (14x+9)(5s-15)=0 | | 0.04+0.08(20-x)=1.4 | | y/7=28 | | (7x+4)(3x-9)=0 | | 5y+8=63 |

Equations solver categories