5x^2-15x-5=0

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


Simplifying
5x2 + -15x + -5 = 0

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

Solving
-5 + -15x + 5x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-1 + -3x + x2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-1 + -3x + x2)' equal to zero and attempt to solve: Simplifying -1 + -3x + x2 = 0 Solving -1 + -3x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + -3x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -3x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -3x + x2 = 0 + 1 -3x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -3x + x2 = 1 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 = 1 + 2.25 Reorder the terms: 2.25 + -3x + x2 = 1 + 2.25 Combine like terms: 1 + 2.25 = 3.25 2.25 + -3x + x2 = 3.25 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = 3.25 Calculate the square root of the right side: 1.802775638 Break this problem into two subproblems by setting (x + -1.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + -1.5 = 1.802775638 Simplifying x + -1.5 = 1.802775638 Reorder the terms: -1.5 + x = 1.802775638 Solving -1.5 + x = 1.802775638 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 = 1.802775638 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.802775638 + 1.5 x = 1.802775638 + 1.5 Combine like terms: 1.802775638 + 1.5 = 3.302775638 x = 3.302775638 Simplifying x = 3.302775638

Subproblem 2

x + -1.5 = -1.802775638 Simplifying x + -1.5 = -1.802775638 Reorder the terms: -1.5 + x = -1.802775638 Solving -1.5 + x = -1.802775638 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 = -1.802775638 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.802775638 + 1.5 x = -1.802775638 + 1.5 Combine like terms: -1.802775638 + 1.5 = -0.302775638 x = -0.302775638 Simplifying x = -0.302775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.302775638, -0.302775638}

Solution

x = {3.302775638, -0.302775638}

See similar equations:

| 13-6x=8-7x | | 7+y=10 | | 8-2x=20+x | | -7x-6=-3x-54 | | 3(h-16)-16=-13 | | 450+225x=2250 | | 6x+18=8x+6 | | 6(z+3)-5(3z+2)=(2z-9) | | n^2-4n-7=0 | | 2x+10=7x+30 | | 6x+2-4x=-10 | | 3(2x-4)+5x=4(4x+4)+2 | | 2X+37=10X | | 9g+7=5g+31 | | 5x+6.2=19 | | n^2-10n+23=0 | | 2(k-5)=6 | | -4+4x=-5x-4 | | 9(h-88)+9=99 | | 5+7x=-31+x | | p-28=8 | | 8x=14+x | | 2x-5(2x+1)=6x+2 | | 2x+3.29=12 | | 6=p+3 | | 3(h+1)+9=0 | | 5(y+x)-4z=-3(y+z)findy | | 3x-9=1+1 | | w+14=19 | | 2(j-10)=-6 | | x^4+x^3+13x-15=0 | | 4+67=3+6(y+9) |

Equations solver categories