16+2b=b^2-4

Simple and best practice solution for 16+2b=b^2-4 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 16+2b=b^2-4 equation:


Simplifying
16 + 2b = b2 + -4

Reorder the terms:
16 + 2b = -4 + b2

Solving
16 + 2b = -4 + b2

Solving for variable 'b'.

Reorder the terms:
16 + 4 + 2b + -1b2 = -4 + b2 + 4 + -1b2

Combine like terms: 16 + 4 = 20
20 + 2b + -1b2 = -4 + b2 + 4 + -1b2

Reorder the terms:
20 + 2b + -1b2 = -4 + 4 + b2 + -1b2

Combine like terms: -4 + 4 = 0
20 + 2b + -1b2 = 0 + b2 + -1b2
20 + 2b + -1b2 = b2 + -1b2

Combine like terms: b2 + -1b2 = 0
20 + 2b + -1b2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-20 + -2b + b2 = 0

Move the constant term to the right:

Add '20' to each side of the equation.
-20 + -2b + 20 + b2 = 0 + 20

Reorder the terms:
-20 + 20 + -2b + b2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + -2b + b2 = 0 + 20
-2b + b2 = 0 + 20

Combine like terms: 0 + 20 = 20
-2b + b2 = 20

The b term is -2b.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2b + 1 + b2 = 20 + 1

Reorder the terms:
1 + -2b + b2 = 20 + 1

Combine like terms: 20 + 1 = 21
1 + -2b + b2 = 21

Factor a perfect square on the left side:
(b + -1)(b + -1) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(b + -1) equal to 4.582575695 and -4.582575695.

Subproblem 1

b + -1 = 4.582575695 Simplifying b + -1 = 4.582575695 Reorder the terms: -1 + b = 4.582575695 Solving -1 + b = 4.582575695 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + b = 4.582575695 + 1 Combine like terms: -1 + 1 = 0 0 + b = 4.582575695 + 1 b = 4.582575695 + 1 Combine like terms: 4.582575695 + 1 = 5.582575695 b = 5.582575695 Simplifying b = 5.582575695

Subproblem 2

b + -1 = -4.582575695 Simplifying b + -1 = -4.582575695 Reorder the terms: -1 + b = -4.582575695 Solving -1 + b = -4.582575695 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + b = -4.582575695 + 1 Combine like terms: -1 + 1 = 0 0 + b = -4.582575695 + 1 b = -4.582575695 + 1 Combine like terms: -4.582575695 + 1 = -3.582575695 b = -3.582575695 Simplifying b = -3.582575695

Solution

The solution to the problem is based on the solutions from the subproblems. b = {5.582575695, -3.582575695}

See similar equations:

| -6p=-48 | | X+5x-4+4x=180 | | (30+w)-(5+w)w= | | 6+2x=1+4x | | 4x-5+15=36 | | 180(n-2)=540n | | 3b+8+5b-6= | | -(4-x)-7=-7x+2 | | In(n^2+12)=in(-9-2) | | 2(3y)+4y=10 | | (30+w)-(5+w)= | | qt=4t+120 | | -14x+16y=50 | | b-9+3b=16 | | 54-42=73 | | 2x+6+x+3x=180 | | 3n-q=17 | | -3x+6y=24 | | 180(n-2)=640n | | 9x^2+x=4x^2-37x+16 | | -16+24=-8 | | -3+6y=24 | | -6x-4y=2 | | 2x-2+x^3-9x^2= | | 14.4=0.6p | | -16+24= | | X^2+29=10x | | -27=-3a | | -28*17= | | 2x+15-x=-7x+17 | | 23+(-12)=13 | | 800=x+y*2 |

Equations solver categories