4b^2-11b-2=0

Simple and best practice solution for 4b^2-11b-2=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 4b^2-11b-2=0 equation:


Simplifying
4b2 + -11b + -2 = 0

Reorder the terms:
-2 + -11b + 4b2 = 0

Solving
-2 + -11b + 4b2 = 0

Solving for variable 'b'.

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

Divide each side by '4'.
-0.5 + -2.75b + b2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -2.75b + 0.5 + b2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -2.75b + b2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -2.75b + b2 = 0 + 0.5
-2.75b + b2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-2.75b + b2 = 0.5

The b term is -2.75b.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75b + 1.890625 + b2 = 0.5 + 1.890625

Reorder the terms:
1.890625 + -2.75b + b2 = 0.5 + 1.890625

Combine like terms: 0.5 + 1.890625 = 2.390625
1.890625 + -2.75b + b2 = 2.390625

Factor a perfect square on the left side:
(b + -1.375)(b + -1.375) = 2.390625

Calculate the square root of the right side: 1.54616461

Break this problem into two subproblems by setting 
(b + -1.375) equal to 1.54616461 and -1.54616461.

Subproblem 1

b + -1.375 = 1.54616461 Simplifying b + -1.375 = 1.54616461 Reorder the terms: -1.375 + b = 1.54616461 Solving -1.375 + b = 1.54616461 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + b = 1.54616461 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + b = 1.54616461 + 1.375 b = 1.54616461 + 1.375 Combine like terms: 1.54616461 + 1.375 = 2.92116461 b = 2.92116461 Simplifying b = 2.92116461

Subproblem 2

b + -1.375 = -1.54616461 Simplifying b + -1.375 = -1.54616461 Reorder the terms: -1.375 + b = -1.54616461 Solving -1.375 + b = -1.54616461 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + b = -1.54616461 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + b = -1.54616461 + 1.375 b = -1.54616461 + 1.375 Combine like terms: -1.54616461 + 1.375 = -0.17116461 b = -0.17116461 Simplifying b = -0.17116461

Solution

The solution to the problem is based on the solutions from the subproblems. b = {2.92116461, -0.17116461}

See similar equations:

| X+(3x)=4 | | 2x-40=-5(3x-6)+3x | | 2x-(6x-5)=7 | | t=11+1.6c | | 8.25x+27=78 | | 16.99=.0527x+x | | 6.8(x-4.5)=27.2 | | 5x+7-3x=8+4x-12 | | -6(-7k+3)=6k-18 | | -8v+6v-30=-24 | | 8=56n | | 1.5x+2.5x=10 | | 8.95+x=21.35 | | (2x-8)+(3x+10)= | | 3x+8=6x-1 | | y-38=62.3 | | 11t+990=20 | | Y=-3x^2+9x+5 | | y+y=-2(2y-35) | | x-.70x=.3x | | 15y-2y+29=Y-27 | | 7n+28=7(n+3) | | 3x+5x=-(x+3) | | 5n+6(n+8)=-6+2n | | X-8.08=-16 | | (7+5b)+(9+4m)= | | 14-4n=29+6n | | 2a+(128-b)=660 | | y=-2(2y-35) | | 12-4x=2(1-7x) | | -3x=4x-23 | | 12.8x-5= |

Equations solver categories