6x^2-15x-4=0

Simple and best practice solution for 6x^2-15x-4=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 6x^2-15x-4=0 equation:


Simplifying
6x2 + -15x + -4 = 0

Reorder the terms:
-4 + -15x + 6x2 = 0

Solving
-4 + -15x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-0.6666666667 + -2.5x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + -2.5x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + -2.5x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + -2.5x + x2 = 0 + 0.6666666667
-2.5x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
-2.5x + x2 = 0.6666666667

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 0.6666666667 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 0.6666666667 + 1.5625

Combine like terms: 0.6666666667 + 1.5625 = 2.2291666667
1.5625 + -2.5x + x2 = 2.2291666667

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 2.2291666667

Calculate the square root of the right side: 1.493039406

Break this problem into two subproblems by setting 
(x + -1.25) equal to 1.493039406 and -1.493039406.

Subproblem 1

x + -1.25 = 1.493039406 Simplifying x + -1.25 = 1.493039406 Reorder the terms: -1.25 + x = 1.493039406 Solving -1.25 + x = 1.493039406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 1.493039406 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 1.493039406 + 1.25 x = 1.493039406 + 1.25 Combine like terms: 1.493039406 + 1.25 = 2.743039406 x = 2.743039406 Simplifying x = 2.743039406

Subproblem 2

x + -1.25 = -1.493039406 Simplifying x + -1.25 = -1.493039406 Reorder the terms: -1.25 + x = -1.493039406 Solving -1.25 + x = -1.493039406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -1.493039406 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -1.493039406 + 1.25 x = -1.493039406 + 1.25 Combine like terms: -1.493039406 + 1.25 = -0.243039406 x = -0.243039406 Simplifying x = -0.243039406

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.743039406, -0.243039406}

See similar equations:

| 13+6r=2r-3 | | 9b-2a+3b-a= | | 2.5x-5+3x+8=67 | | 10x+8-24=8+80x | | 14x=.28 | | 20-3(2y+5)=-25 | | 7+6(5-4n)=-83 | | -6-1+14=14m-13-13m+4 | | 2.5x-5+3x+20=67 | | 4x-6-5x=3 | | 19-13p=17p-4 | | 3x+1y=29 | | 2(v-8)-10=-2(-1+4v) | | h=0.3+5.5t-4.9t^2 | | 2(3u+5)=46 | | X^2-14=6x+2 | | 9m+8=5m-8 | | 2x+-5x=0 | | .2145y+.1667=1.1667 | | 2(1-3x)+5=2x | | (n+2)*5=40 | | 9=18-3 | | 2=c | | 6u^2+11u-24= | | -3r+3(4r-5)=21 | | -9w-14+10w=-6+8 | | -6(m+1)=244 | | 5.4-2p=0 | | 96=11 | | 5-(-x)=-10 | | 2a+(a*a)=24 | | 4x-(x+3)+2x=22 |

Equations solver categories