5x^2-40x=2

Simple and best practice solution for 5x^2-40x=2 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 5x^2-40x=2 equation:


Simplifying
5x2 + -40x = 2

Reorder the terms:
-40x + 5x2 = 2

Solving
-40x + 5x2 = 2

Solving for variable 'x'.

Reorder the terms:
-2 + -40x + 5x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + -40x + 5x2 = 0

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

Divide each side by '5'.
-0.4 + -8x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -8x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -8x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -8x + x2 = 0 + 0.4
-8x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-8x + x2 = 0.4

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 0.4 + 16

Reorder the terms:
16 + -8x + x2 = 0.4 + 16

Combine like terms: 0.4 + 16 = 16.4
16 + -8x + x2 = 16.4

Factor a perfect square on the left side:
(x + -4)(x + -4) = 16.4

Calculate the square root of the right side: 4.049691346

Break this problem into two subproblems by setting 
(x + -4) equal to 4.049691346 and -4.049691346.

Subproblem 1

x + -4 = 4.049691346 Simplifying x + -4 = 4.049691346 Reorder the terms: -4 + x = 4.049691346 Solving -4 + x = 4.049691346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 4.049691346 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.049691346 + 4 x = 4.049691346 + 4 Combine like terms: 4.049691346 + 4 = 8.049691346 x = 8.049691346 Simplifying x = 8.049691346

Subproblem 2

x + -4 = -4.049691346 Simplifying x + -4 = -4.049691346 Reorder the terms: -4 + x = -4.049691346 Solving -4 + x = -4.049691346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -4.049691346 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.049691346 + 4 x = -4.049691346 + 4 Combine like terms: -4.049691346 + 4 = -0.049691346 x = -0.049691346 Simplifying x = -0.049691346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.049691346, -0.049691346}

See similar equations:

| 2x^2-7x+xy-3y-2=0 | | 9x-8x-6=8 | | 3x+(x+50)+90=180 | | 6n+9n=8838 | | 6x/5-2y/3=5/6 | | 0,43x^2*((45-0,87x^2)/3x) | | 16/18=m/13 | | 3rx-2z+1=5rx-8 | | s=5500+4.35*2400 | | -x^2+4x+12=-3x+24 | | s=5500+4.35*800 | | s=5500*4.35*800 | | 4x=4+45 | | 3x+8x-4x-5=37 | | (7n)(7n)= | | x+12+100=180 | | 504=1/2a6^2 | | -2(x-4)-4=4 | | -5(7x-3)+1=-35x+16 | | n/16=1600/4 | | 18+5y=-4y | | 2x-5p+2200=0 | | lnx/498=(-3.6x10^-4)x5574 | | 4x+90+2x=108 | | 2232=1/2a12^2 | | 4(6c-1)-10=22c+4 | | -3-9=10x+3-9x | | s=6500+4.75*2000 | | s=6500+4.75*700 | | 12/35=4/7n | | 10.9=x/4 | | 10.7=x/6 |

Equations solver categories