4x^2-20=3x

Simple and best practice solution for 4x^2-20=3x 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^2-20=3x equation:


Simplifying
4x2 + -20 = 3x

Reorder the terms:
-20 + 4x2 = 3x

Solving
-20 + 4x2 = 3x

Solving for variable 'x'.

Reorder the terms:
-20 + -3x + 4x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-20 + -3x + 4x2 = 0

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

Divide each side by '4'.
-5 + -0.75x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -0.75x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -0.75x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -0.75x + x2 = 0 + 5
-0.75x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-0.75x + x2 = 5

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = 5 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = 5 + 0.140625

Combine like terms: 5 + 0.140625 = 5.140625
0.140625 + -0.75x + x2 = 5.140625

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = 5.140625

Calculate the square root of the right side: 2.267294643

Break this problem into two subproblems by setting 
(x + -0.375) equal to 2.267294643 and -2.267294643.

Subproblem 1

x + -0.375 = 2.267294643 Simplifying x + -0.375 = 2.267294643 Reorder the terms: -0.375 + x = 2.267294643 Solving -0.375 + x = 2.267294643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = 2.267294643 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = 2.267294643 + 0.375 x = 2.267294643 + 0.375 Combine like terms: 2.267294643 + 0.375 = 2.642294643 x = 2.642294643 Simplifying x = 2.642294643

Subproblem 2

x + -0.375 = -2.267294643 Simplifying x + -0.375 = -2.267294643 Reorder the terms: -0.375 + x = -2.267294643 Solving -0.375 + x = -2.267294643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = -2.267294643 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = -2.267294643 + 0.375 x = -2.267294643 + 0.375 Combine like terms: -2.267294643 + 0.375 = -1.892294643 x = -1.892294643 Simplifying x = -1.892294643

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.642294643, -1.892294643}

See similar equations:

| -2xy^2-4xy+6xy^2= | | X+4X+13=61 | | 5n+5=32-4n | | 3/5p+24=36 | | 3z+5=5z-5 | | 4x+3=3x+11 | | 4x+9=-36 | | 7a-4p= | | 4n+40=n+40 | | 28x^2+6x=0 | | 1x+5y=66 | | x^2-4=64 | | 10y+py=w+7 | | -3=x-20 | | 5x+21=17k-3 | | 5f+2f+3+f+5= | | 3x-11=2x+25 | | 4(4+x)=-20 | | n+6=6(2+3) | | 9x^2+32x-144=0 | | -6x+14=-4x-4 | | (2k-3)x+1-k=o | | .50x+1=-x+1 | | n+6=6x(2+3) | | 0=t^2-45-40 | | x^3=0.25 | | 6+4=11 | | 2a=-11 | | 35*5=160 | | 4x+4+6x=-46 | | -9x-17=-5x-45 | | -8x+6=-5x-21 |

Equations solver categories