4b^2+20b+18=3

Simple and best practice solution for 4b^2+20b+18=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 4b^2+20b+18=3 equation:


Simplifying
4b2 + 20b + 18 = 3

Reorder the terms:
18 + 20b + 4b2 = 3

Solving
18 + 20b + 4b2 = 3

Solving for variable 'b'.

Reorder the terms:
18 + -3 + 20b + 4b2 = 3 + -3

Combine like terms: 18 + -3 = 15
15 + 20b + 4b2 = 3 + -3

Combine like terms: 3 + -3 = 0
15 + 20b + 4b2 = 0

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

Divide each side by '4'.
3.75 + 5b + b2 = 0

Move the constant term to the right:

Add '-3.75' to each side of the equation.
3.75 + 5b + -3.75 + b2 = 0 + -3.75

Reorder the terms:
3.75 + -3.75 + 5b + b2 = 0 + -3.75

Combine like terms: 3.75 + -3.75 = 0.00
0.00 + 5b + b2 = 0 + -3.75
5b + b2 = 0 + -3.75

Combine like terms: 0 + -3.75 = -3.75
5b + b2 = -3.75

The b term is 5b.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5b + 6.25 + b2 = -3.75 + 6.25

Reorder the terms:
6.25 + 5b + b2 = -3.75 + 6.25

Combine like terms: -3.75 + 6.25 = 2.5
6.25 + 5b + b2 = 2.5

Factor a perfect square on the left side:
(b + 2.5)(b + 2.5) = 2.5

Calculate the square root of the right side: 1.58113883

Break this problem into two subproblems by setting 
(b + 2.5) equal to 1.58113883 and -1.58113883.

Subproblem 1

b + 2.5 = 1.58113883 Simplifying b + 2.5 = 1.58113883 Reorder the terms: 2.5 + b = 1.58113883 Solving 2.5 + b = 1.58113883 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + b = 1.58113883 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + b = 1.58113883 + -2.5 b = 1.58113883 + -2.5 Combine like terms: 1.58113883 + -2.5 = -0.91886117 b = -0.91886117 Simplifying b = -0.91886117

Subproblem 2

b + 2.5 = -1.58113883 Simplifying b + 2.5 = -1.58113883 Reorder the terms: 2.5 + b = -1.58113883 Solving 2.5 + b = -1.58113883 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + b = -1.58113883 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + b = -1.58113883 + -2.5 b = -1.58113883 + -2.5 Combine like terms: -1.58113883 + -2.5 = -4.08113883 b = -4.08113883 Simplifying b = -4.08113883

Solution

The solution to the problem is based on the solutions from the subproblems. b = {-0.91886117, -4.08113883}

See similar equations:

| 12x^2+11x-36=0 | | 8/4*7/16 | | (2x^3+3)(2x^3+3)= | | 2y+6+3p=y+5p-6 | | 2a^2(4a+1)(4a+1)= | | 3x(15x-8y+12)= | | (X^2-9)/x^2=1 | | (4p^2q-3q^2-2q^3)(-p^2q^2)= | | 3[x+9]=4[y+5] | | -(3x-y)(2x+y)= | | (6u~4_17u~2w-16w~2)/3u~2-2w | | 5x+6y-9=3 | | (3x^2+5x+2)-(2x+3)=0 | | (-4y^2-9y)+(7y^2+y-2)=x | | x/3-2/5=x/2 | | x^4-x^2-8=0 | | (18x^2-3x)+(24x-4)=0 | | -2(x+9)+x=-6(9-x) | | x(x-4)=x^2+6x+3 | | 6/a=-5/3 | | 15+y-2=13 | | 4x-2(x-3)=2(x+1)+6 | | x-.22=76 | | F(x)-f(x-1)=3x^2-5x | | 20x^2+9x+18=0 | | -2n^2-14n+16=0 | | -2x^2-8x+16=0 | | 2(m-l)=5 | | 4x^4-18x^3+19x^2+4=0 | | 4x^3-10x^2-x-2=0 | | 7p*6= | | 6*sin*(4t)=3 |

Equations solver categories