10x^2-7x-13=0

Simple and best practice solution for 10x^2-7x-13=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 10x^2-7x-13=0 equation:


Simplifying
10x2 + -7x + -13 = 0

Reorder the terms:
-13 + -7x + 10x2 = 0

Solving
-13 + -7x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-1.3 + -0.7x + x2 = 0

Move the constant term to the right:

Add '1.3' to each side of the equation.
-1.3 + -0.7x + 1.3 + x2 = 0 + 1.3

Reorder the terms:
-1.3 + 1.3 + -0.7x + x2 = 0 + 1.3

Combine like terms: -1.3 + 1.3 = 0.0
0.0 + -0.7x + x2 = 0 + 1.3
-0.7x + x2 = 0 + 1.3

Combine like terms: 0 + 1.3 = 1.3
-0.7x + x2 = 1.3

The x term is -0.7x.  Take half its coefficient (-0.35).
Square it (0.1225) and add it to both sides.

Add '0.1225' to each side of the equation.
-0.7x + 0.1225 + x2 = 1.3 + 0.1225

Reorder the terms:
0.1225 + -0.7x + x2 = 1.3 + 0.1225

Combine like terms: 1.3 + 0.1225 = 1.4225
0.1225 + -0.7x + x2 = 1.4225

Factor a perfect square on the left side:
(x + -0.35)(x + -0.35) = 1.4225

Calculate the square root of the right side: 1.192686044

Break this problem into two subproblems by setting 
(x + -0.35) equal to 1.192686044 and -1.192686044.

Subproblem 1

x + -0.35 = 1.192686044 Simplifying x + -0.35 = 1.192686044 Reorder the terms: -0.35 + x = 1.192686044 Solving -0.35 + x = 1.192686044 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.35' to each side of the equation. -0.35 + 0.35 + x = 1.192686044 + 0.35 Combine like terms: -0.35 + 0.35 = 0.00 0.00 + x = 1.192686044 + 0.35 x = 1.192686044 + 0.35 Combine like terms: 1.192686044 + 0.35 = 1.542686044 x = 1.542686044 Simplifying x = 1.542686044

Subproblem 2

x + -0.35 = -1.192686044 Simplifying x + -0.35 = -1.192686044 Reorder the terms: -0.35 + x = -1.192686044 Solving -0.35 + x = -1.192686044 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.35' to each side of the equation. -0.35 + 0.35 + x = -1.192686044 + 0.35 Combine like terms: -0.35 + 0.35 = 0.00 0.00 + x = -1.192686044 + 0.35 x = -1.192686044 + 0.35 Combine like terms: -1.192686044 + 0.35 = -0.842686044 x = -0.842686044 Simplifying x = -0.842686044

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.542686044, -0.842686044}

See similar equations:

| 12(4x-3)-8=4-3x | | x+8x-3-x=-6+3x-8 | | 4w-5=-16 | | 3(x-5)=33 | | 6b+11=2b-25 | | 2-5x=(5x) | | x=3(x-40) | | 7-4+3*0+1=4 | | 9ft=in | | 24pt=qt | | 0.77m=cm | | 16-4x=64 | | (3x+8).3=5x-4 | | 3(u+9)= | | x^2+11xy-26y^2=0 | | -3x-8=-2 | | x/2+x/5+x/3=31 | | 5(8x+2)=-230 | | graphx^2+y^2=36 | | [w-8]2-72=0 | | 145= | | x^2+y^2=36 | | 5x=9(x-8)+12 | | 9x^2+21x+10= | | -5(5y-10)+2(2y+10)= | | 11(4-6y)+6(13y+1)=9 | | 1/2(4b+1)=7-1/4(6b-2) | | 4y=3x+17 | | 3xy+6y=0 | | 2(4x+1)=3(4+2x) | | 5()=6 | | 0.2x^3+0.6x^3-0.3x^3= |

Equations solver categories