4x^2-2x-7=0

Simple and best practice solution for 4x^2-2x-7=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^2-2x-7=0 equation:


Simplifying
4x2 + -2x + -7 = 0

Reorder the terms:
-7 + -2x + 4x2 = 0

Solving
-7 + -2x + 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'.
-1.75 + -0.5x + x2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + -0.5x + 1.75 + x2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + -0.5x + x2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + -0.5x + x2 = 0 + 1.75
-0.5x + x2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
-0.5x + x2 = 1.75

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 1.75 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 1.75 + 0.0625

Combine like terms: 1.75 + 0.0625 = 1.8125
0.0625 + -0.5x + x2 = 1.8125

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 1.8125

Calculate the square root of the right side: 1.346291202

Break this problem into two subproblems by setting 
(x + -0.25) equal to 1.346291202 and -1.346291202.

Subproblem 1

x + -0.25 = 1.346291202 Simplifying x + -0.25 = 1.346291202 Reorder the terms: -0.25 + x = 1.346291202 Solving -0.25 + x = 1.346291202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 1.346291202 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 1.346291202 + 0.25 x = 1.346291202 + 0.25 Combine like terms: 1.346291202 + 0.25 = 1.596291202 x = 1.596291202 Simplifying x = 1.596291202

Subproblem 2

x + -0.25 = -1.346291202 Simplifying x + -0.25 = -1.346291202 Reorder the terms: -0.25 + x = -1.346291202 Solving -0.25 + x = -1.346291202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -1.346291202 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -1.346291202 + 0.25 x = -1.346291202 + 0.25 Combine like terms: -1.346291202 + 0.25 = -1.096291202 x = -1.096291202 Simplifying x = -1.096291202

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.596291202, -1.096291202}

See similar equations:

| 12m+7=3m+52 | | .5y=25 | | y+10=6 | | 28-p=3p-84 | | m^2-15=0 | | 2x^2-5(x-1)=3(x-5) | | -4x-2(3x+5)=-6x+2(x+2) | | -5c+9=-16 | | .625y=40 | | 6(2x-1)=7x+1 | | 14+6m=8-16m | | -k-4-4k-3=-1-3k | | 8x^2+36x=0 | | 6(2*x-1)=7x+1 | | -k-4-4k-3=-1-3k(k) | | 22y+4y^2+10=0 | | 4(x+1)=-2(4-x) | | -8=8(5+m) | | .0625y=40 | | 12+5x=7x+5 | | 6+10m=8+12m | | 7n-2=4n+1 | | -x^2+2x+35=0 | | 7(x-3)=42 | | 5x-2=3+5(x-1) | | t-9=-8 | | 65(Y-50)=Y+(-95) | | 180-8t=90+2t | | -13-19=-6 | | -x^2+2x+24=0 | | x^2+20x=125 | | 65(X-50)=Y+(-95) |

Equations solver categories