25x^2-90x+8=0

Simple and best practice solution for 25x^2-90x+8=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^2-90x+8=0 equation:


Simplifying
25x2 + -90x + 8 = 0

Reorder the terms:
8 + -90x + 25x2 = 0

Solving
8 + -90x + 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'.
0.32 + -3.6x + x2 = 0

Move the constant term to the right:

Add '-0.32' to each side of the equation.
0.32 + -3.6x + -0.32 + x2 = 0 + -0.32

Reorder the terms:
0.32 + -0.32 + -3.6x + x2 = 0 + -0.32

Combine like terms: 0.32 + -0.32 = 0.00
0.00 + -3.6x + x2 = 0 + -0.32
-3.6x + x2 = 0 + -0.32

Combine like terms: 0 + -0.32 = -0.32
-3.6x + x2 = -0.32

The x term is -3.6x.  Take half its coefficient (-1.8).
Square it (3.24) and add it to both sides.

Add '3.24' to each side of the equation.
-3.6x + 3.24 + x2 = -0.32 + 3.24

Reorder the terms:
3.24 + -3.6x + x2 = -0.32 + 3.24

Combine like terms: -0.32 + 3.24 = 2.92
3.24 + -3.6x + x2 = 2.92

Factor a perfect square on the left side:
(x + -1.8)(x + -1.8) = 2.92

Calculate the square root of the right side: 1.708800749

Break this problem into two subproblems by setting 
(x + -1.8) equal to 1.708800749 and -1.708800749.

Subproblem 1

x + -1.8 = 1.708800749 Simplifying x + -1.8 = 1.708800749 Reorder the terms: -1.8 + x = 1.708800749 Solving -1.8 + x = 1.708800749 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.8' to each side of the equation. -1.8 + 1.8 + x = 1.708800749 + 1.8 Combine like terms: -1.8 + 1.8 = 0.0 0.0 + x = 1.708800749 + 1.8 x = 1.708800749 + 1.8 Combine like terms: 1.708800749 + 1.8 = 3.508800749 x = 3.508800749 Simplifying x = 3.508800749

Subproblem 2

x + -1.8 = -1.708800749 Simplifying x + -1.8 = -1.708800749 Reorder the terms: -1.8 + x = -1.708800749 Solving -1.8 + x = -1.708800749 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.8' to each side of the equation. -1.8 + 1.8 + x = -1.708800749 + 1.8 Combine like terms: -1.8 + 1.8 = 0.0 0.0 + x = -1.708800749 + 1.8 x = -1.708800749 + 1.8 Combine like terms: -1.708800749 + 1.8 = 0.091199251 x = 0.091199251 Simplifying x = 0.091199251

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.508800749, 0.091199251}

See similar equations:

| 6x+26=80 | | 2x*2x+14= | | k^2x^3-4kx^2+8=0 | | -7(w+3)-5=2(6w-4) | | 25x^2-16x+64=0 | | R=3+13X | | 2(m-4)+7=5(m+3) | | 127+x=180 | | 12(-0.08333333333+-0.75y)+9y=-1 | | x^4-16x^2-64=0 | | 86+x=180 | | 16x^2-17=32 | | 6x+42=2+14 | | 63+7x=154 | | 4.3m-3.36=18.89 | | 12=2x+3y | | 0.37= | | (z+10)+4z=(z+50) | | 12x+9y=-1 | | 4(3x+6)=x+9-8 | | 6p-2=6p-9 | | 415.00=220+0.78X | | 12+2x+3y=8x | | -20=20-4x | | x^2-ky+121=0 | | 5x+x-7=3x+8-6 | | x^3-6*x^2-x+44=0 | | 8x+5=8-x | | 6-2c-10+7c=1 | | 8x^2-17=-81 | | 151=7x+67 | | 2(x+5)+7x=82 |

Equations solver categories