7x^2-27x-3=0

Simple and best practice solution for 7x^2-27x-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 7x^2-27x-3=0 equation:


Simplifying
7x2 + -27x + -3 = 0

Reorder the terms:
-3 + -27x + 7x2 = 0

Solving
-3 + -27x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-0.4285714286 + -3.857142857x + x2 = 0

Move the constant term to the right:

Add '0.4285714286' to each side of the equation.
-0.4285714286 + -3.857142857x + 0.4285714286 + x2 = 0 + 0.4285714286

Reorder the terms:
-0.4285714286 + 0.4285714286 + -3.857142857x + x2 = 0 + 0.4285714286

Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000
0.0000000000 + -3.857142857x + x2 = 0 + 0.4285714286
-3.857142857x + x2 = 0 + 0.4285714286

Combine like terms: 0 + 0.4285714286 = 0.4285714286
-3.857142857x + x2 = 0.4285714286

The x term is -3.857142857x.  Take half its coefficient (-1.928571429).
Square it (3.719387757) and add it to both sides.

Add '3.719387757' to each side of the equation.
-3.857142857x + 3.719387757 + x2 = 0.4285714286 + 3.719387757

Reorder the terms:
3.719387757 + -3.857142857x + x2 = 0.4285714286 + 3.719387757

Combine like terms: 0.4285714286 + 3.719387757 = 4.1479591856
3.719387757 + -3.857142857x + x2 = 4.1479591856

Factor a perfect square on the left side:
(x + -1.928571429)(x + -1.928571429) = 4.1479591856

Calculate the square root of the right side: 2.036653919

Break this problem into two subproblems by setting 
(x + -1.928571429) equal to 2.036653919 and -2.036653919.

Subproblem 1

x + -1.928571429 = 2.036653919 Simplifying x + -1.928571429 = 2.036653919 Reorder the terms: -1.928571429 + x = 2.036653919 Solving -1.928571429 + x = 2.036653919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.928571429' to each side of the equation. -1.928571429 + 1.928571429 + x = 2.036653919 + 1.928571429 Combine like terms: -1.928571429 + 1.928571429 = 0.000000000 0.000000000 + x = 2.036653919 + 1.928571429 x = 2.036653919 + 1.928571429 Combine like terms: 2.036653919 + 1.928571429 = 3.965225348 x = 3.965225348 Simplifying x = 3.965225348

Subproblem 2

x + -1.928571429 = -2.036653919 Simplifying x + -1.928571429 = -2.036653919 Reorder the terms: -1.928571429 + x = -2.036653919 Solving -1.928571429 + x = -2.036653919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.928571429' to each side of the equation. -1.928571429 + 1.928571429 + x = -2.036653919 + 1.928571429 Combine like terms: -1.928571429 + 1.928571429 = 0.000000000 0.000000000 + x = -2.036653919 + 1.928571429 x = -2.036653919 + 1.928571429 Combine like terms: -2.036653919 + 1.928571429 = -0.10808249 x = -0.10808249 Simplifying x = -0.10808249

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.965225348, -0.10808249}

See similar equations:

| (4+t)3=14+t | | 1.4t+1.1=8.3-t | | -24p-5(2-6p)=4(p-5)-16 | | 12x+10x=4-10+6 | | 8(-2x-3)=16 | | 4+3x=21 | | 660x=211200 | | P-15=15-6P | | 2x-8+3x=12 | | -2x+5x=3-21 | | 1.6=7.6+5(k+1.1) | | 8/3+3m/5=61/15 | | 3k-2=26 | | -8m-3(2m-5)-m-4(3m+8)+2m=-1 | | 8b^2+12b-36=0 | | X+140=130 | | 9(v-2)=v+40 | | 43-11x+x^2=55 | | -5-3i/4i | | 5n+4=5n-1 | | (6/7)14-3 | | (2m-9)/(3-m)=7/4 | | 1.7=.5x | | 54=2(w+.5)+2 | | -9=5f+11 | | 8/1+I | | abs(6x-12)=24 | | N/6=15 | | -x=-50 | | n/13=-17 | | 16+x=64 | | 35=7(2x-1) |

Equations solver categories