5x^2+8x=8

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


Simplifying
5x2 + 8x = 8

Reorder the terms:
8x + 5x2 = 8

Solving
8x + 5x2 = 8

Solving for variable 'x'.

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

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

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

Divide each side by '5'.
-1.6 + 1.6x + x2 = 0

Move the constant term to the right:

Add '1.6' to each side of the equation.
-1.6 + 1.6x + 1.6 + x2 = 0 + 1.6

Reorder the terms:
-1.6 + 1.6 + 1.6x + x2 = 0 + 1.6

Combine like terms: -1.6 + 1.6 = 0.0
0.0 + 1.6x + x2 = 0 + 1.6
1.6x + x2 = 0 + 1.6

Combine like terms: 0 + 1.6 = 1.6
1.6x + x2 = 1.6

The x term is 1.6x.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6x + 0.64 + x2 = 1.6 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 1.6 + 0.64

Combine like terms: 1.6 + 0.64 = 2.24
0.64 + 1.6x + x2 = 2.24

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 2.24

Calculate the square root of the right side: 1.496662955

Break this problem into two subproblems by setting 
(x + 0.8) equal to 1.496662955 and -1.496662955.

Subproblem 1

x + 0.8 = 1.496662955 Simplifying x + 0.8 = 1.496662955 Reorder the terms: 0.8 + x = 1.496662955 Solving 0.8 + x = 1.496662955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = 1.496662955 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 1.496662955 + -0.8 x = 1.496662955 + -0.8 Combine like terms: 1.496662955 + -0.8 = 0.696662955 x = 0.696662955 Simplifying x = 0.696662955

Subproblem 2

x + 0.8 = -1.496662955 Simplifying x + 0.8 = -1.496662955 Reorder the terms: 0.8 + x = -1.496662955 Solving 0.8 + x = -1.496662955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = -1.496662955 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -1.496662955 + -0.8 x = -1.496662955 + -0.8 Combine like terms: -1.496662955 + -0.8 = -2.296662955 x = -2.296662955 Simplifying x = -2.296662955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.696662955, -2.296662955}

See similar equations:

| 2x^2=144-42x | | 7x+5=23+5x | | 2*2+4y=13 | | -4m-40=5(m+1) | | -9(-1+x)=-153 | | 2x+2=-30+6x | | 2w+9.75-7w=-5.15 | | 24=2x+5x-10 | | -7x-7y=7 | | 9+4x-7x=6 | | y=x^2-18x+32 | | -9(n+9)=-135 | | x-.4x=282 | | 2x-1+3(x-5)=-2(2x+1) | | 6-8k=1-k-7k | | 2t+8-5t=35 | | -5*15-15y=50 | | -10+4x=5x-6 | | 10x^2-24x+12=0 | | 5x+7-7x=-11 | | -5x-15(-15)=50 | | -5x+2-7x=-82 | | 8+-4.5= | | 2(1)=y | | -8+x=75 | | 3x+7+2x=-8 | | 1=3x^2-2x | | -3+n=-17 | | 3e^3x-5=49 | | -6+3x=5x+6 | | 10k-3k=0 | | 5(2x+1)-3(x+4)=21 |

Equations solver categories