h^2+18h+81=3

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


Simplifying
h2 + 18h + 81 = 3

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

Solving
81 + 18h + h2 = 3

Solving for variable 'h'.

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

Combine like terms: 81 + -3 = 78
78 + 18h + h2 = 3 + -3

Combine like terms: 3 + -3 = 0
78 + 18h + h2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-78' to each side of the equation.
78 + 18h + -78 + h2 = 0 + -78

Reorder the terms:
78 + -78 + 18h + h2 = 0 + -78

Combine like terms: 78 + -78 = 0
0 + 18h + h2 = 0 + -78
18h + h2 = 0 + -78

Combine like terms: 0 + -78 = -78
18h + h2 = -78

The h term is 18h.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18h + 81 + h2 = -78 + 81

Reorder the terms:
81 + 18h + h2 = -78 + 81

Combine like terms: -78 + 81 = 3
81 + 18h + h2 = 3

Factor a perfect square on the left side:
(h + 9)(h + 9) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(h + 9) equal to 1.732050808 and -1.732050808.

Subproblem 1

h + 9 = 1.732050808 Simplifying h + 9 = 1.732050808 Reorder the terms: 9 + h = 1.732050808 Solving 9 + h = 1.732050808 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + h = 1.732050808 + -9 Combine like terms: 9 + -9 = 0 0 + h = 1.732050808 + -9 h = 1.732050808 + -9 Combine like terms: 1.732050808 + -9 = -7.267949192 h = -7.267949192 Simplifying h = -7.267949192

Subproblem 2

h + 9 = -1.732050808 Simplifying h + 9 = -1.732050808 Reorder the terms: 9 + h = -1.732050808 Solving 9 + h = -1.732050808 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + h = -1.732050808 + -9 Combine like terms: 9 + -9 = 0 0 + h = -1.732050808 + -9 h = -1.732050808 + -9 Combine like terms: -1.732050808 + -9 = -10.732050808 h = -10.732050808 Simplifying h = -10.732050808

Solution

The solution to the problem is based on the solutions from the subproblems. h = {-7.267949192, -10.732050808}

See similar equations:

| -3+4a-7b-7ab= | | -5.2+(-8.3)= | | X^3-2x^2-48x-0=0 | | -.75x-.083333=.666667 | | -.75x-.083=.67 | | -.75x-.25=.67 | | z+35=23 | | -.3+2x=-5.1 | | 3.2=n+3 | | 3(X-4)-2(3X-1)=17 | | -3M^2+48M^2=0 | | 24-x=26 | | 14y=280 | | -7z-(-3z)= | | 2x^3=4x^2+2x+4 | | 0.5x=-5 | | 4x-22=x | | 30=y+12 | | .16y+.09(y+9000)=1560 | | 2(x-9)-7x(6-4x)= | | x+6=3x-4 | | -4+x=-1 | | 3.(x-5)+2.2x-4=x-1 | | 2/7(7-4x)=3 | | 16y+9(y+9000)=1560 | | 0.25x=-17 | | -3=7(h-2)+11 | | (-8)*2+24=4x+2*3 | | -5P*21=7*11 | | (x+3)/4=(x-1)/2 | | 6=1.5x+2 | | 1/3(6x-9)=7 |

Equations solver categories