25x^2+40x-12=0

Simple and best practice solution for 25x^2+40x-12=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 25x^2+40x-12=0 equation:


Simplifying
25x2 + 40x + -12 = 0

Reorder the terms:
-12 + 40x + 25x2 = 0

Solving
-12 + 40x + 25x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
25 the coefficient of the squared term: 

Divide each side by '25'.
-0.48 + 1.6x + x2 = 0

Move the constant term to the right:

Add '0.48' to each side of the equation.
-0.48 + 1.6x + 0.48 + x2 = 0 + 0.48

Reorder the terms:
-0.48 + 0.48 + 1.6x + x2 = 0 + 0.48

Combine like terms: -0.48 + 0.48 = 0.00
0.00 + 1.6x + x2 = 0 + 0.48
1.6x + x2 = 0 + 0.48

Combine like terms: 0 + 0.48 = 0.48
1.6x + x2 = 0.48

The x term is 1.6x.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6x + 0.64 + x2 = 0.48 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 0.48 + 0.64

Combine like terms: 0.48 + 0.64 = 1.12
0.64 + 1.6x + x2 = 1.12

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 1.12

Calculate the square root of the right side: 1.058300524

Break this problem into two subproblems by setting 
(x + 0.8) equal to 1.058300524 and -1.058300524.

Subproblem 1

x + 0.8 = 1.058300524 Simplifying x + 0.8 = 1.058300524 Reorder the terms: 0.8 + x = 1.058300524 Solving 0.8 + x = 1.058300524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = 1.058300524 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 1.058300524 + -0.8 x = 1.058300524 + -0.8 Combine like terms: 1.058300524 + -0.8 = 0.258300524 x = 0.258300524 Simplifying x = 0.258300524

Subproblem 2

x + 0.8 = -1.058300524 Simplifying x + 0.8 = -1.058300524 Reorder the terms: 0.8 + x = -1.058300524 Solving 0.8 + x = -1.058300524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = -1.058300524 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -1.058300524 + -0.8 x = -1.058300524 + -0.8 Combine like terms: -1.058300524 + -0.8 = -1.858300524 x = -1.858300524 Simplifying x = -1.858300524

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.258300524, -1.858300524}

See similar equations:

| 8+7(x-8)=1-6(x-4) | | r^2+19rs+90s^2=0 | | 3t+8=50 | | 8*8*8= | | -(2k-11)=7 | | y=-5x^2+1 | | 54+y=25 | | q+25=84 | | c=1.25+110 | | 11x+5-3=10x-6 | | -16t^2-23t+130=0 | | 9+c=88 | | (2x-12)(2x+9)=0 | | 9x^2+30xy+25y^2= | | 12/=48 | | (x-3)(x+11)=0 | | k^2+5kn-84n^2=0 | | x=8y+7 | | 7(3n+2)=8(7n+6)+9 | | c^2-2c=0 | | 14m=5 | | x^2+3=13 | | 3(x+2)=2x+15 | | 8x^2+6x-35=0 | | (4x-9)(2x^2-10x-5)=0 | | 3x^2=6x+4 | | 9x-3+3x=6x+33-3x | | 9(3n+3)=8(9n+9)+1 | | 2(2)+(5)=9 | | r^2-3r-4=0 | | -2=2-x | | 0.05+0.01x=0.4 |

Equations solver categories