3x^2+4x-10=8

Simple and best practice solution for 3x^2+4x-10=8 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 3x^2+4x-10=8 equation:


Simplifying
3x2 + 4x + -10 = 8

Reorder the terms:
-10 + 4x + 3x2 = 8

Solving
-10 + 4x + 3x2 = 8

Solving for variable 'x'.

Reorder the terms:
-10 + -8 + 4x + 3x2 = 8 + -8

Combine like terms: -10 + -8 = -18
-18 + 4x + 3x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-18 + 4x + 3x2 = 0

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

Divide each side by '3'.
-6 + 1.333333333x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 1.333333333x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 1.333333333x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 1.333333333x + x2 = 0 + 6
1.333333333x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
1.333333333x + x2 = 6

The x term is 1.333333333x.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333x + 0.4444444442 + x2 = 6 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333x + x2 = 6 + 0.4444444442

Combine like terms: 6 + 0.4444444442 = 6.4444444442
0.4444444442 + 1.333333333x + x2 = 6.4444444442

Factor a perfect square on the left side:
(x + 0.6666666665)(x + 0.6666666665) = 6.4444444442

Calculate the square root of the right side: 2.538591035

Break this problem into two subproblems by setting 
(x + 0.6666666665) equal to 2.538591035 and -2.538591035.

Subproblem 1

x + 0.6666666665 = 2.538591035 Simplifying x + 0.6666666665 = 2.538591035 Reorder the terms: 0.6666666665 + x = 2.538591035 Solving 0.6666666665 + x = 2.538591035 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = 2.538591035 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = 2.538591035 + -0.6666666665 x = 2.538591035 + -0.6666666665 Combine like terms: 2.538591035 + -0.6666666665 = 1.8719243685 x = 1.8719243685 Simplifying x = 1.8719243685

Subproblem 2

x + 0.6666666665 = -2.538591035 Simplifying x + 0.6666666665 = -2.538591035 Reorder the terms: 0.6666666665 + x = -2.538591035 Solving 0.6666666665 + x = -2.538591035 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = -2.538591035 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = -2.538591035 + -0.6666666665 x = -2.538591035 + -0.6666666665 Combine like terms: -2.538591035 + -0.6666666665 = -3.2052577015 x = -3.2052577015 Simplifying x = -3.2052577015

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.8719243685, -3.2052577015}

See similar equations:

| -10(1+8x)+6=3x-4 | | -2+2x=8 | | 2(-6-12)=-2c-12 | | 25y^2=121 | | 2x-3=7-1 | | 6(8-6x)+4x=2-9x | | 2f-5=5f-17 | | -6(x+3)=-18-6x | | S^2=9+S(1-2S) | | 4x+6+3x=5x+7+2x | | 6x-14+2x+5=2x-1 | | 8t^2+61t=-120 | | 2(2d+3)=6(d+12) | | 30y^2+23y-40=0 | | -6a=-6a | | -5y+2+4y-3=-1 | | 1x=1(6x-1) | | 9p-10=8 | | z+2=2z^2 | | 175000+550x=1680x+35000 | | 2x+4=-18-9x | | 4x^2-x+12=6x+9 | | 3x+-12=2(-4+9)-3 | | 2x*16=3(x+2) | | k-3k=6k+-8k | | -7(1+6n)=-343 | | 3(2x-10)+5=6(x+1) | | -8x+4y=28 | | 10=9+9x | | 2a-8=2a-4 | | 8-2x=3x-2 | | 8s^2+20s=12 |

Equations solver categories