b^2-11b=23

Simple and best practice solution for b^2-11b=23 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^2-11b=23 equation:


Simplifying
b2 + -11b = 23

Reorder the terms:
-11b + b2 = 23

Solving
-11b + b2 = 23

Solving for variable 'b'.

Reorder the terms:
-23 + -11b + b2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + -11b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '23' to each side of the equation.
-23 + -11b + 23 + b2 = 0 + 23

Reorder the terms:
-23 + 23 + -11b + b2 = 0 + 23

Combine like terms: -23 + 23 = 0
0 + -11b + b2 = 0 + 23
-11b + b2 = 0 + 23

Combine like terms: 0 + 23 = 23
-11b + b2 = 23

The b term is -11b.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11b + 30.25 + b2 = 23 + 30.25

Reorder the terms:
30.25 + -11b + b2 = 23 + 30.25

Combine like terms: 23 + 30.25 = 53.25
30.25 + -11b + b2 = 53.25

Factor a perfect square on the left side:
(b + -5.5)(b + -5.5) = 53.25

Calculate the square root of the right side: 7.29725976

Break this problem into two subproblems by setting 
(b + -5.5) equal to 7.29725976 and -7.29725976.

Subproblem 1

b + -5.5 = 7.29725976 Simplifying b + -5.5 = 7.29725976 Reorder the terms: -5.5 + b = 7.29725976 Solving -5.5 + b = 7.29725976 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + b = 7.29725976 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + b = 7.29725976 + 5.5 b = 7.29725976 + 5.5 Combine like terms: 7.29725976 + 5.5 = 12.79725976 b = 12.79725976 Simplifying b = 12.79725976

Subproblem 2

b + -5.5 = -7.29725976 Simplifying b + -5.5 = -7.29725976 Reorder the terms: -5.5 + b = -7.29725976 Solving -5.5 + b = -7.29725976 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + b = -7.29725976 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + b = -7.29725976 + 5.5 b = -7.29725976 + 5.5 Combine like terms: -7.29725976 + 5.5 = -1.79725976 b = -1.79725976 Simplifying b = -1.79725976

Solution

The solution to the problem is based on the solutions from the subproblems. b = {12.79725976, -1.79725976}

See similar equations:

| 48=n-12 | | 3b-2a=4;b/2-2a/3=1 | | 5g=3/2 | | -5(x+9)=100 | | -10-7x+9x=8 | | 2(3c)= | | -38+n=12 | | 4x^4+30x^2+50=0 | | 2(y-8)=-4y | | x^2-26x-315=0 | | x+4.8=17.1 | | 9t+3.6=10.8 | | 13x-21+5x+75=180 | | 36+n=-5 | | 4(y-2)-5=-3(-7y+2)-3y | | 25x=3x | | 9x-25+9x-25+104=160 | | -2(p+6)=9 | | 8(8+2y)+6y=42 | | P+32=-12 | | 0.28-4.3x-2.9= | | 28x^2+28x=0 | | 875x+800=1250x+1100 | | 3(5x+2)=-54 | | (x/9)•11 | | Y=36/x=3 | | 12x-13=4x+9 | | 100q=20 | | y=29/5x | | 7.8+(-9.3)=h | | Y-(10)=-6 | | 3-(h-6)=5(2h+3) |

Equations solver categories