b^2-18b+18=0

Simple and best practice solution for b^2-18b+18=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 b^2-18b+18=0 equation:


Simplifying
b2 + -18b + 18 = 0

Reorder the terms:
18 + -18b + b2 = 0

Solving
18 + -18b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -18b + -18 + b2 = 0 + -18

Reorder the terms:
18 + -18 + -18b + b2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -18b + b2 = 0 + -18
-18b + b2 = 0 + -18

Combine like terms: 0 + -18 = -18
-18b + b2 = -18

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

Add '81' to each side of the equation.
-18b + 81 + b2 = -18 + 81

Reorder the terms:
81 + -18b + b2 = -18 + 81

Combine like terms: -18 + 81 = 63
81 + -18b + b2 = 63

Factor a perfect square on the left side:
(b + -9)(b + -9) = 63

Calculate the square root of the right side: 7.937253933

Break this problem into two subproblems by setting 
(b + -9) equal to 7.937253933 and -7.937253933.

Subproblem 1

b + -9 = 7.937253933 Simplifying b + -9 = 7.937253933 Reorder the terms: -9 + b = 7.937253933 Solving -9 + b = 7.937253933 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + b = 7.937253933 + 9 Combine like terms: -9 + 9 = 0 0 + b = 7.937253933 + 9 b = 7.937253933 + 9 Combine like terms: 7.937253933 + 9 = 16.937253933 b = 16.937253933 Simplifying b = 16.937253933

Subproblem 2

b + -9 = -7.937253933 Simplifying b + -9 = -7.937253933 Reorder the terms: -9 + b = -7.937253933 Solving -9 + b = -7.937253933 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + b = -7.937253933 + 9 Combine like terms: -9 + 9 = 0 0 + b = -7.937253933 + 9 b = -7.937253933 + 9 Combine like terms: -7.937253933 + 9 = 1.062746067 b = 1.062746067 Simplifying b = 1.062746067

Solution

The solution to the problem is based on the solutions from the subproblems. b = {16.937253933, 1.062746067}

See similar equations:

| (x-7)[x-(9-2i)][x-(9+2i)]= | | log(3x-6)=4 | | -8+4(-8+3)=-12 | | 9y-40=-2(y-2) | | |-12*(7/30)-1,25| | | (12u^5v^4)/(15u^5-3u^3x^3) | | -8+(3+10x)4= | | 6x+2=140 | | -12*(7/30)-1,25 | | 2(3t-5)=18t+7 | | x+25+3x=-30-3x-36 | | 2x-31=3x+18 | | Sinx/tanx | | 2(x-1)+3(x-1)+5(x-1)=7(1-2x)-2(1-2x) | | 8x-12=15x-14 | | -4x-6x=-2x+x-10 | | 6(x+1)+6x+62=180 | | 5+10=-20 | | -13x-14=-79 | | 5+10=20 | | p(x)=12-2x+12-2x+18-2x+18-2x | | 2(3x-7)=25x+8 | | (2x+4)(5x+6)= | | 4x/8=3 | | 1/12-4=19/24 | | 4[2x+5(3-2x)-12]=5(x-1)+3(x+1)+18 | | 9-3x=-18 | | 16-(1-8y)=y-13 | | 2(3x-6)=17x+7 | | 11=4+x | | 225=1550-(x+y) | | (x-1)(2x+4)(3x-1)=0 |

Equations solver categories