3c^2+c-7=0

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


Simplifying
3c2 + c + -7 = 0

Reorder the terms:
-7 + c + 3c2 = 0

Solving
-7 + c + 3c2 = 0

Solving for variable 'c'.

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

Divide each side by '3'.
-2.333333333 + 0.3333333333c + c2 = 0

Move the constant term to the right:

Add '2.333333333' to each side of the equation.
-2.333333333 + 0.3333333333c + 2.333333333 + c2 = 0 + 2.333333333

Reorder the terms:
-2.333333333 + 2.333333333 + 0.3333333333c + c2 = 0 + 2.333333333

Combine like terms: -2.333333333 + 2.333333333 = 0.000000000
0.000000000 + 0.3333333333c + c2 = 0 + 2.333333333
0.3333333333c + c2 = 0 + 2.333333333

Combine like terms: 0 + 2.333333333 = 2.333333333
0.3333333333c + c2 = 2.333333333

The c term is c.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.3333333333c + 0.25 + c2 = 2.333333333 + 0.25

Reorder the terms:
0.25 + 0.3333333333c + c2 = 2.333333333 + 0.25

Combine like terms: 2.333333333 + 0.25 = 2.583333333
0.25 + 0.3333333333c + c2 = 2.583333333

Factor a perfect square on the left side:
(c + 0.5)(c + 0.5) = 2.583333333

Calculate the square root of the right side: 1.607275127

Break this problem into two subproblems by setting 
(c + 0.5) equal to 1.607275127 and -1.607275127.

Subproblem 1

c + 0.5 = 1.607275127 Simplifying c + 0.5 = 1.607275127 Reorder the terms: 0.5 + c = 1.607275127 Solving 0.5 + c = 1.607275127 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + c = 1.607275127 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + c = 1.607275127 + -0.5 c = 1.607275127 + -0.5 Combine like terms: 1.607275127 + -0.5 = 1.107275127 c = 1.107275127 Simplifying c = 1.107275127

Subproblem 2

c + 0.5 = -1.607275127 Simplifying c + 0.5 = -1.607275127 Reorder the terms: 0.5 + c = -1.607275127 Solving 0.5 + c = -1.607275127 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + c = -1.607275127 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + c = -1.607275127 + -0.5 c = -1.607275127 + -0.5 Combine like terms: -1.607275127 + -0.5 = -2.107275127 c = -2.107275127 Simplifying c = -2.107275127

Solution

The solution to the problem is based on the solutions from the subproblems. c = {1.107275127, -2.107275127}

See similar equations:

| (x^5+y^4)(x^5-y^4)= | | 5.6=0.02x+7.38 | | x*8+13=x | | x*8+13= | | 38-3x=15x+16 | | 8-10x=188-45x | | 141-4x=10x+17 | | -22-4x=6-9x | | 6x-3=13x-37 | | 2x+48=4x+12 | | 196-n=0 | | 4c=324 | | 84-3x=2x+9 | | ln(y)=ln(5x)+ln(C) | | 3(x+1)-4=3 | | 4a(x+2)-a(x+2)= | | y-2+5=16 | | 30+2(6x-8)=2x-(5-2x)+51 | | ax+b+c=0 | | 6(x-2)=2(x+7) | | 7-8x=115-36x | | 7x+30=4x | | x=45-2x | | 26=21 | | 127-5x=5x+7 | | 3x+9=81-5x | | 7h+3=2h-7 | | 5x-4=13x-52 | | 2x+4=3x+6 | | 10x-9=9(x-1) | | 3x+22=10x+62 | | 0.2x+0.22x=0.84 |

Equations solver categories