20x^2-30x-6=0

Simple and best practice solution for 20x^2-30x-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 20x^2-30x-6=0 equation:


Simplifying
20x2 + -30x + -6 = 0

Reorder the terms:
-6 + -30x + 20x2 = 0

Solving
-6 + -30x + 20x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-3 + -15x + 10x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-3 + -15x + 10x2)' equal to zero and attempt to solve: Simplifying -3 + -15x + 10x2 = 0 Solving -3 + -15x + 10x2 = 0 Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. -0.3 + -1.5x + x2 = 0.0 Move the constant term to the right: Add '0.3' to each side of the equation. -0.3 + -1.5x + 0.3 + x2 = 0.0 + 0.3 Reorder the terms: -0.3 + 0.3 + -1.5x + x2 = 0.0 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + -1.5x + x2 = 0.0 + 0.3 -1.5x + x2 = 0.0 + 0.3 Combine like terms: 0.0 + 0.3 = 0.3 -1.5x + x2 = 0.3 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = 0.3 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = 0.3 + 0.5625 Combine like terms: 0.3 + 0.5625 = 0.8625 0.5625 + -1.5x + x2 = 0.8625 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = 0.8625 Calculate the square root of the right side: 0.928708781 Break this problem into two subproblems by setting (x + -0.75) equal to 0.928708781 and -0.928708781.

Subproblem 1

x + -0.75 = 0.928708781 Simplifying x + -0.75 = 0.928708781 Reorder the terms: -0.75 + x = 0.928708781 Solving -0.75 + x = 0.928708781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 0.928708781 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 0.928708781 + 0.75 x = 0.928708781 + 0.75 Combine like terms: 0.928708781 + 0.75 = 1.678708781 x = 1.678708781 Simplifying x = 1.678708781

Subproblem 2

x + -0.75 = -0.928708781 Simplifying x + -0.75 = -0.928708781 Reorder the terms: -0.75 + x = -0.928708781 Solving -0.75 + x = -0.928708781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -0.928708781 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -0.928708781 + 0.75 x = -0.928708781 + 0.75 Combine like terms: -0.928708781 + 0.75 = -0.178708781 x = -0.178708781 Simplifying x = -0.178708781

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.678708781, -0.178708781}

Solution

x = {1.678708781, -0.178708781}

See similar equations:

| -6+2.5=-8x+3.7 | | 3.33x=1 | | 8x-3=7x | | 4p^2+5p-1=-2 | | 2x-2.9=x-3.5 | | 4x-1.5=x | | 6a^2+31a+5=0 | | 8Y+27=2Y-3 | | x+x-18=84 | | p^2+18+81p=0 | | 38-b=b-2 | | 8M-5=11 | | -1+6=6b-3-5b | | 21n^2+80n=-64 | | 3k^2+11k-36=6 | | 13v=7(9-v) | | 15-4a=5a-3 | | 3n^2+23n+14=0 | | 12n+3=9n-15 | | 2x+-4=12 | | 7.9(8.3)= | | v^2+12v+32=0 | | 8-4.03= | | 12x+6=9+27 | | 5.67-0.79= | | 5x^2+5x-22=2-2x | | 18-x+36=48 | | -12(-33)= | | 6.5x+5=4.5x+19 | | -43+(-65)= | | 3v^4w^4-3v^4=0 | | 3(2n+6)=2(4n-8) |

Equations solver categories