5x^2+2x-5=0

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


Simplifying
5x2 + 2x + -5 = 0

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

Solving
-5 + 2x + 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'.
-1 + 0.4x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 0.4x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 0.4x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 0.4x + x2 = 0 + 1
0.4x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
0.4x + x2 = 1

The x term is 0.4x.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4x + 0.04 + x2 = 1 + 0.04

Reorder the terms:
0.04 + 0.4x + x2 = 1 + 0.04

Combine like terms: 1 + 0.04 = 1.04
0.04 + 0.4x + x2 = 1.04

Factor a perfect square on the left side:
(x + 0.2)(x + 0.2) = 1.04

Calculate the square root of the right side: 1.019803903

Break this problem into two subproblems by setting 
(x + 0.2) equal to 1.019803903 and -1.019803903.

Subproblem 1

x + 0.2 = 1.019803903 Simplifying x + 0.2 = 1.019803903 Reorder the terms: 0.2 + x = 1.019803903 Solving 0.2 + x = 1.019803903 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = 1.019803903 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = 1.019803903 + -0.2 x = 1.019803903 + -0.2 Combine like terms: 1.019803903 + -0.2 = 0.819803903 x = 0.819803903 Simplifying x = 0.819803903

Subproblem 2

x + 0.2 = -1.019803903 Simplifying x + 0.2 = -1.019803903 Reorder the terms: 0.2 + x = -1.019803903 Solving 0.2 + x = -1.019803903 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = -1.019803903 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = -1.019803903 + -0.2 x = -1.019803903 + -0.2 Combine like terms: -1.019803903 + -0.2 = -1.219803903 x = -1.219803903 Simplifying x = -1.219803903

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.819803903, -1.219803903}

See similar equations:

| 5(x-1)(x-1)=-35 | | [x-7]=-8 | | 5(2x-3)=42 | | 52=4k | | -1.3(x-2)=19.5 | | 16b-92=12 | | 12-40x+25x^2=0 | | 1.3(x-2)=19.5 | | b-10=5 | | -3(3x+6)=12 | | x+1=-3 | | -7(2X-10)=4X-10 | | 4y^2-9=0 | | -.4c-8=32 | | 4y+9=43 | | -.4*c-8=32 | | 4(x-3)-2(x-5)+1=5(3x+4)-6x | | f(9)=8(9)-6 | | x+2x-3= | | -14+s=32 | | -4x=-28 | | x-5+x-8+x+x+3+12+12+10+x+x=72 | | 5x-6=-1 | | 5x-55+8x-48= | | 8x+26+3x=5y+38 | | T=T+O+L+U | | 4g+6=34-3g | | 10x^3-13x^2-11x+12=0 | | 9x+20+7x=2y | | -5n+6=5n-4 | | 4x+3+9x-7=25 | | 20x^2+21x+4=0 |

Equations solver categories