5x^2-4x-6=0

Simple and best practice solution for 5x^2-4x-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^2-4x-6=0 equation:


Simplifying
5x2 + -4x + -6 = 0

Reorder the terms:
-6 + -4x + 5x2 = 0

Solving
-6 + -4x + 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 + -0.8x + x2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -0.8x + 1.2 + x2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -0.8x + x2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -0.8x + x2 = 0 + 1.2
-0.8x + x2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-0.8x + x2 = 1.2

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = 1.2 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = 1.2 + 0.16

Combine like terms: 1.2 + 0.16 = 1.36
0.16 + -0.8x + x2 = 1.36

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = 1.36

Calculate the square root of the right side: 1.166190379

Break this problem into two subproblems by setting 
(x + -0.4) equal to 1.166190379 and -1.166190379.

Subproblem 1

x + -0.4 = 1.166190379 Simplifying x + -0.4 = 1.166190379 Reorder the terms: -0.4 + x = 1.166190379 Solving -0.4 + x = 1.166190379 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 1.166190379 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 1.166190379 + 0.4 x = 1.166190379 + 0.4 Combine like terms: 1.166190379 + 0.4 = 1.566190379 x = 1.566190379 Simplifying x = 1.566190379

Subproblem 2

x + -0.4 = -1.166190379 Simplifying x + -0.4 = -1.166190379 Reorder the terms: -0.4 + x = -1.166190379 Solving -0.4 + x = -1.166190379 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -1.166190379 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -1.166190379 + 0.4 x = -1.166190379 + 0.4 Combine like terms: -1.166190379 + 0.4 = -0.766190379 x = -0.766190379 Simplifying x = -0.766190379

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.566190379, -0.766190379}

See similar equations:

| -3(4x+5)= | | 7w+w=71 | | .5*1+4=2 | | X^3+x=100 | | 2x^2+21x+49=0 | | (1.00+x)+x=1.10 | | -8=-176 | | n-9=22 | | 9(x+3)-3x=3(2x+2)-10 | | 1s=91 | | -14j=-8 | | 10-10x=122-31x | | 12a=12 | | 8r=24 | | 1.10=(1.00+x)+y | | x^3+6x^2=5r+30 | | b^4-b^2-12=0 | | -.5714285714u=-24 | | 5x+12=33-10x | | 8=m^16 | | 7x+66=4x | | x^2(5+3x)=4(5+3x) | | -.57u=-24 | | log(3-x)=-1 | | -2x-3x^2+6=0 | | 6-2x=6x-10x+8-2 | | (x+7)*x=60 | | X+2+x^2=74 | | -42+x=15 | | 100=8*5*h | | 7.3-0.2x+1.3-0.6x=12-0.8x-36 | | 47=11+g |

Equations solver categories