4x^2-2x-18=0

Simple and best practice solution for 4x^2-2x-18=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-18=0 equation:


Simplifying
4x2 + -2x + -18 = 0

Reorder the terms:
-18 + -2x + 4x2 = 0

Solving
-18 + -2x + 4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-9 + -1x + 2x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-9 + -1x + 2x2)' equal to zero and attempt to solve: Simplifying -9 + -1x + 2x2 = 0 Solving -9 + -1x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -4.5 + -0.5x + x2 = 0 Move the constant term to the right: Add '4.5' to each side of the equation. -4.5 + -0.5x + 4.5 + x2 = 0 + 4.5 Reorder the terms: -4.5 + 4.5 + -0.5x + x2 = 0 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + -0.5x + x2 = 0 + 4.5 -0.5x + x2 = 0 + 4.5 Combine like terms: 0 + 4.5 = 4.5 -0.5x + x2 = 4.5 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 = 4.5 + 0.0625 Reorder the terms: 0.0625 + -0.5x + x2 = 4.5 + 0.0625 Combine like terms: 4.5 + 0.0625 = 4.5625 0.0625 + -0.5x + x2 = 4.5625 Factor a perfect square on the left side: (x + -0.25)(x + -0.25) = 4.5625 Calculate the square root of the right side: 2.136000936 Break this problem into two subproblems by setting (x + -0.25) equal to 2.136000936 and -2.136000936.

Subproblem 1

x + -0.25 = 2.136000936 Simplifying x + -0.25 = 2.136000936 Reorder the terms: -0.25 + x = 2.136000936 Solving -0.25 + x = 2.136000936 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 = 2.136000936 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 2.136000936 + 0.25 x = 2.136000936 + 0.25 Combine like terms: 2.136000936 + 0.25 = 2.386000936 x = 2.386000936 Simplifying x = 2.386000936

Subproblem 2

x + -0.25 = -2.136000936 Simplifying x + -0.25 = -2.136000936 Reorder the terms: -0.25 + x = -2.136000936 Solving -0.25 + x = -2.136000936 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 = -2.136000936 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -2.136000936 + 0.25 x = -2.136000936 + 0.25 Combine like terms: -2.136000936 + 0.25 = -1.886000936 x = -1.886000936 Simplifying x = -1.886000936

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.386000936, -1.886000936}

Solution

x = {2.386000936, -1.886000936}

See similar equations:

| 4xR+2x(10-R)=32 | | 4(x+y)=10x+y | | 3x=4y-10 | | 4x+4y=10x+y | | -6x+2=14 | | -2(6v-7)=86 | | 5x+60=30 | | e^2k=4 | | 5x=12x-20 | | (9p+7)(2p-4)= | | -6x+12=14 | | 5(7a+5)=130 | | P=0.6(900)-93 | | 8823+2= | | 8x-8=48 | | P=0.6x-93 | | 18p^2-22p-21= | | 5(2x+1)=3(x-4) | | 6a^2-6a-5=0 | | 6=2*x | | 2(x+3)+4y= | | 3(2-3x)=x-4 | | X=3x+6 | | y^3=-22y^2-40y | | 25=x^4 | | 5x^2+16x+60=0 | | 8(23t)+3(7x)= | | X^2+7x+28=0 | | -10a+15b= | | 15y^2-41y-28=0 | | 7c+14a=28 | | x=883707 |

Equations solver categories