7b^2+2b-3=0

Simple and best practice solution for 7b^2+2b-3=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 7b^2+2b-3=0 equation:


Simplifying
7b2 + 2b + -3 = 0

Reorder the terms:
-3 + 2b + 7b2 = 0

Solving
-3 + 2b + 7b2 = 0

Solving for variable 'b'.

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

Divide each side by '7'.
-0.4285714286 + 0.2857142857b + b2 = 0

Move the constant term to the right:

Add '0.4285714286' to each side of the equation.
-0.4285714286 + 0.2857142857b + 0.4285714286 + b2 = 0 + 0.4285714286

Reorder the terms:
-0.4285714286 + 0.4285714286 + 0.2857142857b + b2 = 0 + 0.4285714286

Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000
0.0000000000 + 0.2857142857b + b2 = 0 + 0.4285714286
0.2857142857b + b2 = 0 + 0.4285714286

Combine like terms: 0 + 0.4285714286 = 0.4285714286
0.2857142857b + b2 = 0.4285714286

The b term is 0.2857142857b.  Take half its coefficient (0.1428571429).
Square it (0.02040816328) and add it to both sides.

Add '0.02040816328' to each side of the equation.
0.2857142857b + 0.02040816328 + b2 = 0.4285714286 + 0.02040816328

Reorder the terms:
0.02040816328 + 0.2857142857b + b2 = 0.4285714286 + 0.02040816328

Combine like terms: 0.4285714286 + 0.02040816328 = 0.44897959188
0.02040816328 + 0.2857142857b + b2 = 0.44897959188

Factor a perfect square on the left side:
(b + 0.1428571429)(b + 0.1428571429) = 0.44897959188

Calculate the square root of the right side: 0.670059394

Break this problem into two subproblems by setting 
(b + 0.1428571429) equal to 0.670059394 and -0.670059394.

Subproblem 1

b + 0.1428571429 = 0.670059394 Simplifying b + 0.1428571429 = 0.670059394 Reorder the terms: 0.1428571429 + b = 0.670059394 Solving 0.1428571429 + b = 0.670059394 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + b = 0.670059394 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + b = 0.670059394 + -0.1428571429 b = 0.670059394 + -0.1428571429 Combine like terms: 0.670059394 + -0.1428571429 = 0.5272022511 b = 0.5272022511 Simplifying b = 0.5272022511

Subproblem 2

b + 0.1428571429 = -0.670059394 Simplifying b + 0.1428571429 = -0.670059394 Reorder the terms: 0.1428571429 + b = -0.670059394 Solving 0.1428571429 + b = -0.670059394 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + b = -0.670059394 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + b = -0.670059394 + -0.1428571429 b = -0.670059394 + -0.1428571429 Combine like terms: -0.670059394 + -0.1428571429 = -0.8129165369 b = -0.8129165369 Simplifying b = -0.8129165369

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.5272022511, -0.8129165369}

See similar equations:

| 0.6(6x+12)=1.4-(x+2) | | 6+5x-1(3)=10 | | .10x+x-12(.25)=11 | | 1/6(3x-135)=5x | | .10x+-3x=11 | | -.2+30=-2x+3 | | 15d-(-62)=947 | | X/-9=16 | | 64+x=228-3x | | 9+8q=12+7u | | .02x=10 | | 9j(6k^2-2k+13j)= | | 10x*2+4x+12=0 | | 5+5a=6a-7 | | 105-2k=73 | | 13(x-4)=7x-10 | | 5s=4s+10 | | 6(3a+1)-30=3(20-4) | | 3t=2t+6 | | 3v+36=5v | | y=-16x^2+112x+2 | | B(x)=1.2x-(0.12x)3 | | 3w=6w-30 | | (30+2x)(40+2x)=2000 | | Log(2x+11)=3 | | 12=24x-(-12) | | 12+3x=8-(4-4x) | | 3w-4z=-5 | | b-7=2b-3(4b+1)-4 | | 5x-44=x+24 | | 33/84 | | 8d-2=9+7x |

Equations solver categories