5b^2+7b=10

Simple and best practice solution for 5b^2+7b=10 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 5b^2+7b=10 equation:


Simplifying
5b2 + 7b = 10

Reorder the terms:
7b + 5b2 = 10

Solving
7b + 5b2 = 10

Solving for variable 'b'.

Reorder the terms:
-10 + 7b + 5b2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 7b + 5b2 = 0

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

Divide each side by '5'.
-2 + 1.4b + b2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 1.4b + 2 + b2 = 0 + 2

Reorder the terms:
-2 + 2 + 1.4b + b2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 1.4b + b2 = 0 + 2
1.4b + b2 = 0 + 2

Combine like terms: 0 + 2 = 2
1.4b + b2 = 2

The b term is 1.4b.  Take half its coefficient (0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
1.4b + 0.49 + b2 = 2 + 0.49

Reorder the terms:
0.49 + 1.4b + b2 = 2 + 0.49

Combine like terms: 2 + 0.49 = 2.49
0.49 + 1.4b + b2 = 2.49

Factor a perfect square on the left side:
(b + 0.7)(b + 0.7) = 2.49

Calculate the square root of the right side: 1.577973384

Break this problem into two subproblems by setting 
(b + 0.7) equal to 1.577973384 and -1.577973384.

Subproblem 1

b + 0.7 = 1.577973384 Simplifying b + 0.7 = 1.577973384 Reorder the terms: 0.7 + b = 1.577973384 Solving 0.7 + b = 1.577973384 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + b = 1.577973384 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + b = 1.577973384 + -0.7 b = 1.577973384 + -0.7 Combine like terms: 1.577973384 + -0.7 = 0.877973384 b = 0.877973384 Simplifying b = 0.877973384

Subproblem 2

b + 0.7 = -1.577973384 Simplifying b + 0.7 = -1.577973384 Reorder the terms: 0.7 + b = -1.577973384 Solving 0.7 + b = -1.577973384 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + b = -1.577973384 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + b = -1.577973384 + -0.7 b = -1.577973384 + -0.7 Combine like terms: -1.577973384 + -0.7 = -2.277973384 b = -2.277973384 Simplifying b = -2.277973384

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.877973384, -2.277973384}

See similar equations:

| 4x+6y=-1 | | 2(k-3)+5=3(k-1) | | 7y-2y=14 | | 43+28=28+43 | | 8a-5b-2a+b= | | 5(t+1)-3(t-1)=5t-1 | | 14-3x=38 | | 10x^3-25x^2+15x=0 | | 8x-3y=2 | | x+2/3=1/4 | | -12+9y=-57 | | (x/5)-1=-3 | | 7y-5y=14 | | 8x-5x+8y-6x= | | -39-2y=-25 | | x-(2/5)=0.6 | | 44/7-3 | | 4y^3-4Y^2-3+3y=0 | | 45-8y=5 | | -32+9y=-14 | | 2(4+-1y)-y=6 | | -8y^2=-12-y^4 | | 5x+2y+6=0 | | -3/2x+2=y | | h/2=7 | | 8x+19=-21 | | 4y-2=8y+4 | | x/1.3=-8 | | 8y-2x= | | 24,5/7,2 | | -41=3(r+5)+5r | | 36/5-4 |

Equations solver categories