h^2+81h+18=3

Simple and best practice solution for h^2+81h+18=3 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 h^2+81h+18=3 equation:


Simplifying
h2 + 81h + 18 = 3

Reorder the terms:
18 + 81h + h2 = 3

Solving
18 + 81h + h2 = 3

Solving for variable 'h'.

Reorder the terms:
18 + -3 + 81h + h2 = 3 + -3

Combine like terms: 18 + -3 = 15
15 + 81h + h2 = 3 + -3

Combine like terms: 3 + -3 = 0
15 + 81h + h2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + 81h + -15 + h2 = 0 + -15

Reorder the terms:
15 + -15 + 81h + h2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 81h + h2 = 0 + -15
81h + h2 = 0 + -15

Combine like terms: 0 + -15 = -15
81h + h2 = -15

The h term is 81h.  Take half its coefficient (40.5).
Square it (1640.25) and add it to both sides.

Add '1640.25' to each side of the equation.
81h + 1640.25 + h2 = -15 + 1640.25

Reorder the terms:
1640.25 + 81h + h2 = -15 + 1640.25

Combine like terms: -15 + 1640.25 = 1625.25
1640.25 + 81h + h2 = 1625.25

Factor a perfect square on the left side:
(h + 40.5)(h + 40.5) = 1625.25

Calculate the square root of the right side: 40.314389491

Break this problem into two subproblems by setting 
(h + 40.5) equal to 40.314389491 and -40.314389491.

Subproblem 1

h + 40.5 = 40.314389491 Simplifying h + 40.5 = 40.314389491 Reorder the terms: 40.5 + h = 40.314389491 Solving 40.5 + h = 40.314389491 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-40.5' to each side of the equation. 40.5 + -40.5 + h = 40.314389491 + -40.5 Combine like terms: 40.5 + -40.5 = 0.0 0.0 + h = 40.314389491 + -40.5 h = 40.314389491 + -40.5 Combine like terms: 40.314389491 + -40.5 = -0.185610509 h = -0.185610509 Simplifying h = -0.185610509

Subproblem 2

h + 40.5 = -40.314389491 Simplifying h + 40.5 = -40.314389491 Reorder the terms: 40.5 + h = -40.314389491 Solving 40.5 + h = -40.314389491 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-40.5' to each side of the equation. 40.5 + -40.5 + h = -40.314389491 + -40.5 Combine like terms: 40.5 + -40.5 = 0.0 0.0 + h = -40.314389491 + -40.5 h = -40.314389491 + -40.5 Combine like terms: -40.314389491 + -40.5 = -80.814389491 h = -80.814389491 Simplifying h = -80.814389491

Solution

The solution to the problem is based on the solutions from the subproblems. h = {-0.185610509, -80.814389491}

See similar equations:

| 3+5c=23 | | -9y=-4y-10 | | -2[5.25+6.2]=4[-3.1x+2.68] | | 4+30d-5=21d-27-19 | | 4y+4y+3y+3+37+3=90 | | 9x+3x+-10=3(3x+1x) | | mx=g | | 4x-[3+2(x-1)]=3 | | x^8-16x^7-17x^6= | | X^3-6x^2+2x-12=0 | | 18x^2+36x+10=0 | | .6m-60=1.6m | | 7(4-4x-3x)+5(9x+2)=10 | | 42+20t+2t^2= | | 8t+6t=-47 | | x^2+11xy+30y^2= | | 4569+1.8x=500 | | 2n+n+3=33 | | 10x+10=1x+13+2x | | 6x-6x=5 | | 3x-9+2x=-3x+7 | | 2x-1x+7=x+3+4 | | 3(z+7)=7+z | | 5-(m+3)=1+2(m-3) | | 5a-75=10a | | y=(f-k)x+2 | | 115-y+115=180 | | 6x^2y+78xy-30y= | | 2.8m-0.4=0.8m | | 54-3=2w | | v=.33-bh | | 115-x=1 |

Equations solver categories