5x^2-15x+2=0

Simple and best practice solution for 5x^2-15x+2=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^2-15x+2=0 equation:


Simplifying
5x2 + -15x + 2 = 0

Reorder the terms:
2 + -15x + 5x2 = 0

Solving
2 + -15x + 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'.
0.4 + -3x + x2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + -3x + -0.4 + x2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + -3x + x2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -3x + x2 = 0 + -0.4
-3x + x2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
-3x + x2 = -0.4

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -0.4 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -0.4 + 2.25

Combine like terms: -0.4 + 2.25 = 1.85
2.25 + -3x + x2 = 1.85

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 1.85

Calculate the square root of the right side: 1.360147051

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.360147051 and -1.360147051.

Subproblem 1

x + -1.5 = 1.360147051 Simplifying x + -1.5 = 1.360147051 Reorder the terms: -1.5 + x = 1.360147051 Solving -1.5 + x = 1.360147051 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.360147051 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.360147051 + 1.5 x = 1.360147051 + 1.5 Combine like terms: 1.360147051 + 1.5 = 2.860147051 x = 2.860147051 Simplifying x = 2.860147051

Subproblem 2

x + -1.5 = -1.360147051 Simplifying x + -1.5 = -1.360147051 Reorder the terms: -1.5 + x = -1.360147051 Solving -1.5 + x = -1.360147051 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.360147051 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.360147051 + 1.5 x = -1.360147051 + 1.5 Combine like terms: -1.360147051 + 1.5 = 0.139852949 x = 0.139852949 Simplifying x = 0.139852949

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.860147051, 0.139852949}

See similar equations:

| b-9=-5 | | 8x-(3x-7)=5(x+2) | | -(z+6)=-15 | | 16n^2+121=21 | | 10-1Y=10Y-1Y^2 | | g^9+47=64 | | 4x-5+4x-5+x+7+4x+1=180 | | 4x+2(400-x)=1000 | | -2x-6(-5x+18)=32 | | -6a+2=-3(2a-1) | | 8.33r=10 | | X+.06=6272 | | 2x+5+4x-1=148 | | 109-6x=30x+21 | | 6-9x=21-16x | | n=3 | | 2c+c+14=30 | | 2n^2+7=0 | | 10-1X=10X-1X^2 | | p=8p-7 | | 11x+2=5x+10 | | 4x+12=-96-8x | | 8t+4t=40 | | 6x+2(-x+11)=42 | | -5x-8x= | | 20x+5=90 | | 125-3x=4x+20 | | -4t+14=2 | | 15+x/6=(-26) | | -3(2x-9)=4(3x+6) | | (5x-2z)(3x+8z)= | | 7m-5=17 |

Equations solver categories