10b^2-15=8b-12

Simple and best practice solution for 10b^2-15=8b-12 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 10b^2-15=8b-12 equation:


Simplifying
10b2 + -15 = 8b + -12

Reorder the terms:
-15 + 10b2 = 8b + -12

Reorder the terms:
-15 + 10b2 = -12 + 8b

Solving
-15 + 10b2 = -12 + 8b

Solving for variable 'b'.

Reorder the terms:
-15 + 12 + -8b + 10b2 = -12 + 8b + 12 + -8b

Combine like terms: -15 + 12 = -3
-3 + -8b + 10b2 = -12 + 8b + 12 + -8b

Reorder the terms:
-3 + -8b + 10b2 = -12 + 12 + 8b + -8b

Combine like terms: -12 + 12 = 0
-3 + -8b + 10b2 = 0 + 8b + -8b
-3 + -8b + 10b2 = 8b + -8b

Combine like terms: 8b + -8b = 0
-3 + -8b + 10b2 = 0

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

Divide each side by '10'.
-0.3 + -0.8b + b2 = 0

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + -0.8b + 0.3 + b2 = 0 + 0.3

Reorder the terms:
-0.3 + 0.3 + -0.8b + b2 = 0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + -0.8b + b2 = 0 + 0.3
-0.8b + b2 = 0 + 0.3

Combine like terms: 0 + 0.3 = 0.3
-0.8b + b2 = 0.3

The b term is -0.8b.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8b + 0.16 + b2 = 0.3 + 0.16

Reorder the terms:
0.16 + -0.8b + b2 = 0.3 + 0.16

Combine like terms: 0.3 + 0.16 = 0.46
0.16 + -0.8b + b2 = 0.46

Factor a perfect square on the left side:
(b + -0.4)(b + -0.4) = 0.46

Calculate the square root of the right side: 0.678232998

Break this problem into two subproblems by setting 
(b + -0.4) equal to 0.678232998 and -0.678232998.

Subproblem 1

b + -0.4 = 0.678232998 Simplifying b + -0.4 = 0.678232998 Reorder the terms: -0.4 + b = 0.678232998 Solving -0.4 + b = 0.678232998 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + b = 0.678232998 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + b = 0.678232998 + 0.4 b = 0.678232998 + 0.4 Combine like terms: 0.678232998 + 0.4 = 1.078232998 b = 1.078232998 Simplifying b = 1.078232998

Subproblem 2

b + -0.4 = -0.678232998 Simplifying b + -0.4 = -0.678232998 Reorder the terms: -0.4 + b = -0.678232998 Solving -0.4 + b = -0.678232998 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + b = -0.678232998 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + b = -0.678232998 + 0.4 b = -0.678232998 + 0.4 Combine like terms: -0.678232998 + 0.4 = -0.278232998 b = -0.278232998 Simplifying b = -0.278232998

Solution

The solution to the problem is based on the solutions from the subproblems. b = {1.078232998, -0.278232998}

See similar equations:

| 12-9x=48-37x | | x^2+4000x-8960000=0 | | .5(x-3+2x-4)=30 | | -56-2x=14-9 | | (u-4)(u+7)= | | -12+x=19 | | 5x-23=15x-63 | | 5s+13=-68 | | 5t^2=10t+75 | | 4f*56=469 | | 3f=21.6 | | -3d=-63 | | 2n+7=23 | | 3h-5=7 | | 40=4(x+1) | | a+4=9.6 | | 4(-8x+5)=-32x-36 | | c-25=19 | | 4x+15y=6x+7y | | 8x+68=-68 | | 35-8x=155 | | 9-[2k-3]=k | | 6x-2-7x=5 | | -2x+17=-7 | | 4x-7=-31 | | 4x-10x= | | y-3=3(x+2) | | g(t)=3t^2-9t-84 | | -15=7x+2x+3 | | 4x^3-5x^2+12x-15=0 | | Y^2+25=0 | | 3(1+3x)=2(-4x+7) |

Equations solver categories