5x^2+25x+28=0

Simple and best practice solution for 5x^2+25x+28=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+25x+28=0 equation:


Simplifying
5x2 + 25x + 28 = 0

Reorder the terms:
28 + 25x + 5x2 = 0

Solving
28 + 25x + 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'.
5.6 + 5x + x2 = 0

Move the constant term to the right:

Add '-5.6' to each side of the equation.
5.6 + 5x + -5.6 + x2 = 0 + -5.6

Reorder the terms:
5.6 + -5.6 + 5x + x2 = 0 + -5.6

Combine like terms: 5.6 + -5.6 = 0.0
0.0 + 5x + x2 = 0 + -5.6
5x + x2 = 0 + -5.6

Combine like terms: 0 + -5.6 = -5.6
5x + x2 = -5.6

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -5.6 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -5.6 + 6.25

Combine like terms: -5.6 + 6.25 = 0.65
6.25 + 5x + x2 = 0.65

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 0.65

Calculate the square root of the right side: 0.806225775

Break this problem into two subproblems by setting 
(x + 2.5) equal to 0.806225775 and -0.806225775.

Subproblem 1

x + 2.5 = 0.806225775 Simplifying x + 2.5 = 0.806225775 Reorder the terms: 2.5 + x = 0.806225775 Solving 2.5 + x = 0.806225775 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 0.806225775 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 0.806225775 + -2.5 x = 0.806225775 + -2.5 Combine like terms: 0.806225775 + -2.5 = -1.693774225 x = -1.693774225 Simplifying x = -1.693774225

Subproblem 2

x + 2.5 = -0.806225775 Simplifying x + 2.5 = -0.806225775 Reorder the terms: 2.5 + x = -0.806225775 Solving 2.5 + x = -0.806225775 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -0.806225775 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -0.806225775 + -2.5 x = -0.806225775 + -2.5 Combine like terms: -0.806225775 + -2.5 = -3.306225775 x = -3.306225775 Simplifying x = -3.306225775

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.693774225, -3.306225775}

See similar equations:

| x+3=-53-6x | | 2x^2+13x+12=0 | | 3x+4(5x+3)=81 | | 50x=80(x-3) | | 2y^2-8y-10=o | | -3x-7-6x=-25 | | 4y^3-7y^2+28-16y=0 | | x/6-21=14 | | -8(u-4)=-5u+35 | | 1/12x=-2/3 | | x/6.21=14 | | -130-(-190)= | | x^2+mx+80=0 | | X^2-2x-6=3 | | 8/3x=-2 | | -130-190= | | 3x+7=3x+10 | | x+10=x*2+35 | | x^2+16x+80=0 | | 24/x=15/18 | | x^2+40x+80=0 | | -x^2+50=25 | | 2(3x-14)=11 | | -7/5x=21 | | 1x+2y=40 | | 4q-10=76 | | 2/4=4/8 | | X^2-8x-333=0 | | 1/3•2 | | 4x-3.75=16 | | 7x+4-8x=6 | | 0=w^2+4w-96 |

Equations solver categories