6x^2+3x-15=0

Simple and best practice solution for 6x^2+3x-15=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+3x-15=0 equation:


Simplifying
6x2 + 3x + -15 = 0

Reorder the terms:
-15 + 3x + 6x2 = 0

Solving
-15 + 3x + 6x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-5 + x + 2x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + x + 2x2)' equal to zero and attempt to solve: Simplifying -5 + x + 2x2 = 0 Solving -5 + x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -2.5 + 0.5x + x2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + 0.5x + 2.5 + x2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + 0.5x + x2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + 0.5x + x2 = 0 + 2.5 0.5x + x2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 0.5x + x2 = 2.5 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.5x + 0.25 + x2 = 2.5 + 0.25 Reorder the terms: 0.25 + 0.5x + x2 = 2.5 + 0.25 Combine like terms: 2.5 + 0.25 = 2.75 0.25 + 0.5x + x2 = 2.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 2.75 Calculate the square root of the right side: 1.658312395 Break this problem into two subproblems by setting (x + 0.5) equal to 1.658312395 and -1.658312395.

Subproblem 1

x + 0.5 = 1.658312395 Simplifying x + 0.5 = 1.658312395 Reorder the terms: 0.5 + x = 1.658312395 Solving 0.5 + x = 1.658312395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 1.658312395 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.658312395 + -0.5 x = 1.658312395 + -0.5 Combine like terms: 1.658312395 + -0.5 = 1.158312395 x = 1.158312395 Simplifying x = 1.158312395

Subproblem 2

x + 0.5 = -1.658312395 Simplifying x + 0.5 = -1.658312395 Reorder the terms: 0.5 + x = -1.658312395 Solving 0.5 + x = -1.658312395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -1.658312395 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.658312395 + -0.5 x = -1.658312395 + -0.5 Combine like terms: -1.658312395 + -0.5 = -2.158312395 x = -2.158312395 Simplifying x = -2.158312395

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.158312395, -2.158312395}

Solution

x = {1.158312395, -2.158312395}

See similar equations:

| 9x=6x+24 | | 6(r-9)+r+30-7r= | | 10-5w=25 | | 5(8x-2)=10x | | 3x-9=-3x+27 | | -4=-21-5x | | 2x^2-29x=0 | | (0.25)(6x+4)=5x | | 3.5=125-5s | | 7x+5=-3+4x+20 | | 4p+p= | | 11-5(a+2)=7+a | | 8=5x-1 | | 2x^2+6x-8=0 | | 6=7x-9 | | 3y^3-y^2+21y-7=0 | | 4s+10=2s+2 | | 4(5x+1)=3x-8x | | 2y-4x=2 | | 2x+1=.66666667x-3 | | 3(2x+1)=4x-7x | | 2x+1=.667x-3 | | 9(5x+1)=3x-6x | | 4+z+2=21-2z | | 2x+1=.66x-3 | | 1.5+.5(4x+10)=1.5x+.5x+2 | | 7(5x+1)=2x-7x | | (x+11)(x+11)=13 | | 7(2x+1)=2x-9x | | 3x+2=x+3 | | -4x+3(x+8)=22 | | (x+1)(x+1)=11 |

Equations solver categories