10x^2+13x-15=0

Simple and best practice solution for 10x^2+13x-15=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+13x-15=0 equation:


Simplifying
10x2 + 13x + -15 = 0

Reorder the terms:
-15 + 13x + 10x2 = 0

Solving
-15 + 13x + 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'.
-1.5 + 1.3x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 1.3x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 1.3x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 1.3x + x2 = 0 + 1.5
1.3x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
1.3x + x2 = 1.5

The x term is 1.3x.  Take half its coefficient (0.65).
Square it (0.4225) and add it to both sides.

Add '0.4225' to each side of the equation.
1.3x + 0.4225 + x2 = 1.5 + 0.4225

Reorder the terms:
0.4225 + 1.3x + x2 = 1.5 + 0.4225

Combine like terms: 1.5 + 0.4225 = 1.9225
0.4225 + 1.3x + x2 = 1.9225

Factor a perfect square on the left side:
(x + 0.65)(x + 0.65) = 1.9225

Calculate the square root of the right side: 1.386542462

Break this problem into two subproblems by setting 
(x + 0.65) equal to 1.386542462 and -1.386542462.

Subproblem 1

x + 0.65 = 1.386542462 Simplifying x + 0.65 = 1.386542462 Reorder the terms: 0.65 + x = 1.386542462 Solving 0.65 + x = 1.386542462 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.65' to each side of the equation. 0.65 + -0.65 + x = 1.386542462 + -0.65 Combine like terms: 0.65 + -0.65 = 0.00 0.00 + x = 1.386542462 + -0.65 x = 1.386542462 + -0.65 Combine like terms: 1.386542462 + -0.65 = 0.736542462 x = 0.736542462 Simplifying x = 0.736542462

Subproblem 2

x + 0.65 = -1.386542462 Simplifying x + 0.65 = -1.386542462 Reorder the terms: 0.65 + x = -1.386542462 Solving 0.65 + x = -1.386542462 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.65' to each side of the equation. 0.65 + -0.65 + x = -1.386542462 + -0.65 Combine like terms: 0.65 + -0.65 = 0.00 0.00 + x = -1.386542462 + -0.65 x = -1.386542462 + -0.65 Combine like terms: -1.386542462 + -0.65 = -2.036542462 x = -2.036542462 Simplifying x = -2.036542462

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.736542462, -2.036542462}

See similar equations:

| 4(2+5)= | | .11x+.3(x-4)=.01(5x-5) | | 3/y+3-1/y-2=5/2y+6 | | 3(4-7x)=-2(3-x) | | 343=x^3 | | 1/2q | | ((2x^2-5)-(x-7))(3)=0 | | r+-18=-38 | | 7x*7x=567 | | 5t+100=1000 | | 5x+(12x-41)=180 | | z-1=8 | | 12/6=6x/6 | | 5x+(12x-41)= | | (2/5)x+8=(17/5)x-13 | | 10y+5=10 | | -3(r+6)=-38 | | (4x-12)/12x | | 4x-12/12x | | (x/3)=12 | | 9a-14=4a+6 | | x^3+9x^2+18x+18=0 | | v/8=38/7 | | Z^2/6-z/2-45=0 | | 1/3x+1=-7 | | 97x=108 | | 7a+6=-9 | | (5-x)/(x^2+2x+35) | | (2x+10)=(3x-15) | | 3y^3-3y^2-60y= | | (4x/9)+(7x-13)+(2x-2)=180 | | 8x^2/4x |

Equations solver categories