(b+5)(2b+5)=4b^2+b+4

Simple and best practice solution for (b+5)(2b+5)=4b^2+b+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 (b+5)(2b+5)=4b^2+b+4 equation:


Simplifying
(b + 5)(2b + 5) = 4b2 + b + 4

Reorder the terms:
(5 + b)(2b + 5) = 4b2 + b + 4

Reorder the terms:
(5 + b)(5 + 2b) = 4b2 + b + 4

Multiply (5 + b) * (5 + 2b)
(5(5 + 2b) + b(5 + 2b)) = 4b2 + b + 4
((5 * 5 + 2b * 5) + b(5 + 2b)) = 4b2 + b + 4
((25 + 10b) + b(5 + 2b)) = 4b2 + b + 4
(25 + 10b + (5 * b + 2b * b)) = 4b2 + b + 4
(25 + 10b + (5b + 2b2)) = 4b2 + b + 4

Combine like terms: 10b + 5b = 15b
(25 + 15b + 2b2) = 4b2 + b + 4

Reorder the terms:
25 + 15b + 2b2 = 4 + b + 4b2

Solving
25 + 15b + 2b2 = 4 + b + 4b2

Solving for variable 'b'.

Reorder the terms:
25 + -4 + 15b + -1b + 2b2 + -4b2 = 4 + b + 4b2 + -4 + -1b + -4b2

Combine like terms: 25 + -4 = 21
21 + 15b + -1b + 2b2 + -4b2 = 4 + b + 4b2 + -4 + -1b + -4b2

Combine like terms: 15b + -1b = 14b
21 + 14b + 2b2 + -4b2 = 4 + b + 4b2 + -4 + -1b + -4b2

Combine like terms: 2b2 + -4b2 = -2b2
21 + 14b + -2b2 = 4 + b + 4b2 + -4 + -1b + -4b2

Reorder the terms:
21 + 14b + -2b2 = 4 + -4 + b + -1b + 4b2 + -4b2

Combine like terms: 4 + -4 = 0
21 + 14b + -2b2 = 0 + b + -1b + 4b2 + -4b2
21 + 14b + -2b2 = b + -1b + 4b2 + -4b2

Combine like terms: b + -1b = 0
21 + 14b + -2b2 = 0 + 4b2 + -4b2
21 + 14b + -2b2 = 4b2 + -4b2

Combine like terms: 4b2 + -4b2 = 0
21 + 14b + -2b2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-10.5 + -7b + b2 = 0

Move the constant term to the right:

Add '10.5' to each side of the equation.
-10.5 + -7b + 10.5 + b2 = 0 + 10.5

Reorder the terms:
-10.5 + 10.5 + -7b + b2 = 0 + 10.5

Combine like terms: -10.5 + 10.5 = 0.0
0.0 + -7b + b2 = 0 + 10.5
-7b + b2 = 0 + 10.5

Combine like terms: 0 + 10.5 = 10.5
-7b + b2 = 10.5

The b term is -7b.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7b + 12.25 + b2 = 10.5 + 12.25

Reorder the terms:
12.25 + -7b + b2 = 10.5 + 12.25

Combine like terms: 10.5 + 12.25 = 22.75
12.25 + -7b + b2 = 22.75

Factor a perfect square on the left side:
(b + -3.5)(b + -3.5) = 22.75

Calculate the square root of the right side: 4.769696007

Break this problem into two subproblems by setting 
(b + -3.5) equal to 4.769696007 and -4.769696007.

Subproblem 1

b + -3.5 = 4.769696007 Simplifying b + -3.5 = 4.769696007 Reorder the terms: -3.5 + b = 4.769696007 Solving -3.5 + b = 4.769696007 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + b = 4.769696007 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + b = 4.769696007 + 3.5 b = 4.769696007 + 3.5 Combine like terms: 4.769696007 + 3.5 = 8.269696007 b = 8.269696007 Simplifying b = 8.269696007

Subproblem 2

b + -3.5 = -4.769696007 Simplifying b + -3.5 = -4.769696007 Reorder the terms: -3.5 + b = -4.769696007 Solving -3.5 + b = -4.769696007 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + b = -4.769696007 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + b = -4.769696007 + 3.5 b = -4.769696007 + 3.5 Combine like terms: -4.769696007 + 3.5 = -1.269696007 b = -1.269696007 Simplifying b = -1.269696007

Solution

The solution to the problem is based on the solutions from the subproblems. b = {8.269696007, -1.269696007}

See similar equations:

| 0.71429x-5=50 | | 7x+151=-265-6x | | 620/699= | | .6x+4=.5x+5 | | -14(-9x-35)=-770 | | 3a=6a+42 | | -26=84+5x | | 6(a-1)=2(n+1) | | 6y+1=180 | | 21y+13=90 | | 34-180= | | 3x-2(-1)=5 | | 21y+13=180 | | 1-3-1/8 | | 25-3x=-27-2x | | 25b+1=-11 | | 3x-20=12-x | | 7x-3=6x-8 | | 5-x+2x=3x-20+12-x | | 3x-2y=5findy | | 5-x=2x | | -2(x+4)+7x=-13 | | 100/p=p | | x-55+x-15=x+10 | | 2^6x-4=1/32 | | 2x^3-7x^2-9x= | | x+25+x+20=3x+15 | | 7x+15y=73 | | 49X+38y=1862 | | 4b^4-6b^2-40= | | x-40=x-30 | | 270=1/3*81*h |

Equations solver categories