3x^2-6x=15

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


Simplifying
3x2 + -6x = 15

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

Solving
-6x + 3x2 = 15

Solving for variable 'x'.

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

Combine like terms: 15 + -15 = 0
-15 + -6x + 3x2 = 0

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

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + -2x + x2)' equal to zero and attempt to solve: Simplifying -5 + -2x + x2 = 0 Solving -5 + -2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + -2x + 5 + x2 = 0 + 5 Reorder the terms: -5 + 5 + -2x + x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -2x + x2 = 0 + 5 -2x + x2 = 0 + 5 Combine like terms: 0 + 5 = 5 -2x + x2 = 5 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = 5 + 1 Reorder the terms: 1 + -2x + x2 = 5 + 1 Combine like terms: 5 + 1 = 6 1 + -2x + x2 = 6 Factor a perfect square on the left side: (x + -1)(x + -1) = 6 Calculate the square root of the right side: 2.449489743 Break this problem into two subproblems by setting (x + -1) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + -1 = 2.449489743 Simplifying x + -1 = 2.449489743 Reorder the terms: -1 + x = 2.449489743 Solving -1 + x = 2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 2.449489743 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.449489743 + 1 x = 2.449489743 + 1 Combine like terms: 2.449489743 + 1 = 3.449489743 x = 3.449489743 Simplifying x = 3.449489743

Subproblem 2

x + -1 = -2.449489743 Simplifying x + -1 = -2.449489743 Reorder the terms: -1 + x = -2.449489743 Solving -1 + x = -2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -2.449489743 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.449489743 + 1 x = -2.449489743 + 1 Combine like terms: -2.449489743 + 1 = -1.449489743 x = -1.449489743 Simplifying x = -1.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.449489743, -1.449489743}

Solution

x = {3.449489743, -1.449489743}

See similar equations:

| 7y-12+6y+8=180 | | (-2)-3=y | | 5y+7y-34=180 | | 1.4-0.5x=0.4+5.5x | | 0.09xX=96.03 | | -50-c=5c-2 | | 2x+7=3x+25 | | 9x+12=-42 | | -5w-4w= | | 7-2x+x=10 | | 72.48+6x=18.01x | | -6x+18=16 | | 5p-11=13p-43 | | 4x+6y=130 | | 10log1/30 | | 1+p=12 | | 2g+5=19 | | 1.4-0.5x=0.4+1.4 | | 5x+8-4x=9 | | 5x-11=3x+15 | | v+-1=-3 | | 2/3(6x-2)=1/3x | | 5w-29=22-2w | | 2x-6-x-3=7 | | 5x+3(x+5.25)=60.25 | | x+60=(5x) | | 4x+4y=3+4x+y | | 8+7x+x=80 | | 4x+-2=0.5+5 | | 7*7*7/7*7*7*7*7= | | 7*7*7/7*7*7*7*7 | | 8x-6y=13 |

Equations solver categories