4x^2+40x-20=0

Simple and best practice solution for 4x^2+40x-20=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+40x-20=0 equation:


Simplifying
4x2 + 40x + -20 = 0

Reorder the terms:
-20 + 40x + 4x2 = 0

Solving
-20 + 40x + 4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-5 + 10x + x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-5 + 10x + x2)' equal to zero and attempt to solve: Simplifying -5 + 10x + x2 = 0 Solving -5 + 10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + 10x + 5 + x2 = 0 + 5 Reorder the terms: -5 + 5 + 10x + x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + 10x + x2 = 0 + 5 10x + x2 = 0 + 5 Combine like terms: 0 + 5 = 5 10x + x2 = 5 The x term is 10x. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10x + 25 + x2 = 5 + 25 Reorder the terms: 25 + 10x + x2 = 5 + 25 Combine like terms: 5 + 25 = 30 25 + 10x + x2 = 30 Factor a perfect square on the left side: (x + 5)(x + 5) = 30 Calculate the square root of the right side: 5.477225575 Break this problem into two subproblems by setting (x + 5) equal to 5.477225575 and -5.477225575.

Subproblem 1

x + 5 = 5.477225575 Simplifying x + 5 = 5.477225575 Reorder the terms: 5 + x = 5.477225575 Solving 5 + x = 5.477225575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 5.477225575 + -5 Combine like terms: 5 + -5 = 0 0 + x = 5.477225575 + -5 x = 5.477225575 + -5 Combine like terms: 5.477225575 + -5 = 0.477225575 x = 0.477225575 Simplifying x = 0.477225575

Subproblem 2

x + 5 = -5.477225575 Simplifying x + 5 = -5.477225575 Reorder the terms: 5 + x = -5.477225575 Solving 5 + x = -5.477225575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -5.477225575 + -5 Combine like terms: 5 + -5 = 0 0 + x = -5.477225575 + -5 x = -5.477225575 + -5 Combine like terms: -5.477225575 + -5 = -10.477225575 x = -10.477225575 Simplifying x = -10.477225575

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.477225575, -10.477225575}

Solution

x = {0.477225575, -10.477225575}

See similar equations:

| -18=8c-3c | | 52x+4=57x-46 | | 3x-5(x-4)=-5+2x+9 | | 29.5+-5.5x=7.5(3x+3.5) | | 20+22=196 | | 7a^2+2a-6=0 | | 7x+14=5x-2 | | 5x=21-11 | | -3(9+6x)=81 | | 7.14/10.92 | | (2x+10)=(3x+1) | | 4x+42=7(x+6)-3x | | x+-3y=-6 | | 9(2s+6)=-19-5s | | 5+4=3+8 | | 0.4(2n+8)=20-(n+5) | | 5/9(x-32)=29 | | 3.4/5.2 | | 35+x=15+6x | | 7k-8k=-15k | | -2x-1=-3x+4 | | 2=(3a-7) | | 5/6*6/1 | | 3/4x-25/4=-1/4 | | 4(1x+9)=-4 | | .33(x+12)=2x+.66 | | 2(x-3)+4(3-2x)= | | 3(2x+1)=-45 | | 2(1-4x)=-78 | | 2/150 | | 9x+2(-3x-5)=8 | | 3(x-4)=5x-9-2x |

Equations solver categories