4x^2-8x-3=0

Simple and best practice solution for 4x^2-8x-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 4x^2-8x-3=0 equation:


Simplifying
4x2 + -8x + -3 = 0

Reorder the terms:
-3 + -8x + 4x2 = 0

Solving
-3 + -8x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-0.75 + -2x + x2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + -2x + 0.75 + x2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + -2x + x2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + -2x + x2 = 0 + 0.75
-2x + x2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
-2x + x2 = 0.75

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 0.75 + 1

Reorder the terms:
1 + -2x + x2 = 0.75 + 1

Combine like terms: 0.75 + 1 = 1.75
1 + -2x + x2 = 1.75

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1.75

Calculate the square root of the right side: 1.322875656

Break this problem into two subproblems by setting 
(x + -1) equal to 1.322875656 and -1.322875656.

Subproblem 1

x + -1 = 1.322875656 Simplifying x + -1 = 1.322875656 Reorder the terms: -1 + x = 1.322875656 Solving -1 + x = 1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.322875656 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.322875656 + 1 x = 1.322875656 + 1 Combine like terms: 1.322875656 + 1 = 2.322875656 x = 2.322875656 Simplifying x = 2.322875656

Subproblem 2

x + -1 = -1.322875656 Simplifying x + -1 = -1.322875656 Reorder the terms: -1 + x = -1.322875656 Solving -1 + x = -1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.322875656 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.322875656 + 1 x = -1.322875656 + 1 Combine like terms: -1.322875656 + 1 = -0.322875656 x = -0.322875656 Simplifying x = -0.322875656

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.322875656, -0.322875656}

See similar equations:

| 3x+30=5x+12 | | 2x^2+10x=3 | | 4(a+2b-6)+5(2a+6b-8)= | | 5=3n-6 | | 5x^2-35x+25=0 | | 8+4(x-1)-5(x-3)=2(5-2x) | | 3x^2+15x-36=0 | | 12x+9=10x+15 | | .6666666667(18x-12)=7-3(-4x-3) | | 83-3x=42x+18 | | -5+6d+3=34 | | 14-8x=80-29x | | 4.1q-5.2-4.6q=-1.5q-2.7 | | 525.00+5.00x=0 | | 3(3h-1.2)=5.7 | | -14-9x=7x+18 | | 2x+13=-41-7x | | y-5=-3x | | 122-5x=4x+23 | | -10-6x=10-10x | | 67-5x=8x+15 | | 5(j-4)+j=-8 | | x^2-11x=9 | | y=7y-48 | | 5x+13=77-3x | | 5+5x=17+x | | x^2-18x+5=0 | | 2x-4+8=-60 | | 3x+16=11x-80 | | 12x-7=8x+5 | | x=9 | | x^2+18x-1=0 |

Equations solver categories