5x^2+8x-6=0

Simple and best practice solution for 5x^2+8x-6=0 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-6=0 equation:


Simplifying
5x2 + 8x + -6 = 0

Reorder the terms:
-6 + 8x + 5x2 = 0

Solving
-6 + 8x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-1.2 + 1.6x + x2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + 1.6x + 1.2 + x2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + 1.6x + x2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 1.6x + x2 = 0 + 1.2
1.6x + x2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
1.6x + x2 = 1.2

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 = 1.2 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 1.2 + 0.64

Combine like terms: 1.2 + 0.64 = 1.84
0.64 + 1.6x + x2 = 1.84

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 1.84

Calculate the square root of the right side: 1.356465997

Break this problem into two subproblems by setting 
(x + 0.8) equal to 1.356465997 and -1.356465997.

Subproblem 1

x + 0.8 = 1.356465997 Simplifying x + 0.8 = 1.356465997 Reorder the terms: 0.8 + x = 1.356465997 Solving 0.8 + x = 1.356465997 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 = 1.356465997 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 1.356465997 + -0.8 x = 1.356465997 + -0.8 Combine like terms: 1.356465997 + -0.8 = 0.556465997 x = 0.556465997 Simplifying x = 0.556465997

Subproblem 2

x + 0.8 = -1.356465997 Simplifying x + 0.8 = -1.356465997 Reorder the terms: 0.8 + x = -1.356465997 Solving 0.8 + x = -1.356465997 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 = -1.356465997 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -1.356465997 + -0.8 x = -1.356465997 + -0.8 Combine like terms: -1.356465997 + -0.8 = -2.156465997 x = -2.156465997 Simplifying x = -2.156465997

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.556465997, -2.156465997}

See similar equations:

| -8=2*0 | | 15(t-2)+3=6(3t+4)-10 | | X^2+Y^2-3X-4Y+4=0 | | 12x=8400 | | 2(X-4)+2Y^2=18 | | 6x-12=36-10x | | 16n+192=4n | | 4=-y+3 | | 4*-1=-y+3 | | 6p-8=10 | | 9y+108=45y | | 15x-9x+12=6 | | 15x-9x+11=6 | | 2(6z-1)-5(z+4)=2(z+1) | | 8x-32=28 | | 0=-y+2 | | 4*-1=-y+2 | | 2x-8=8x+4 | | 2*-1=-y+2 | | 7x-12=x+6(2+x) | | .75w+8=.33w-7 | | 7xy^2-5xy(2-y)= | | -7=4(x+3)+5x | | .5w+7=2w-2 | | -4n+10+2n=18 | | 7xy-5xy(2-y)= | | -(5y+5)-(4y-7)=1 | | w-2d=4 | | =-1 | | 6(1-t)-(2-4t)=1 | | 2x+14-x+3=3x+4 | | x+x+35+3x-39=586 |

Equations solver categories