2x^2-30x+55=0

Simple and best practice solution for 2x^2-30x+55=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 2x^2-30x+55=0 equation:


Simplifying
2x2 + -30x + 55 = 0

Reorder the terms:
55 + -30x + 2x2 = 0

Solving
55 + -30x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
27.5 + -15x + x2 = 0

Move the constant term to the right:

Add '-27.5' to each side of the equation.
27.5 + -15x + -27.5 + x2 = 0 + -27.5

Reorder the terms:
27.5 + -27.5 + -15x + x2 = 0 + -27.5

Combine like terms: 27.5 + -27.5 = 0.0
0.0 + -15x + x2 = 0 + -27.5
-15x + x2 = 0 + -27.5

Combine like terms: 0 + -27.5 = -27.5
-15x + x2 = -27.5

The x term is -15x.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15x + 56.25 + x2 = -27.5 + 56.25

Reorder the terms:
56.25 + -15x + x2 = -27.5 + 56.25

Combine like terms: -27.5 + 56.25 = 28.75
56.25 + -15x + x2 = 28.75

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 28.75

Calculate the square root of the right side: 5.361902647

Break this problem into two subproblems by setting 
(x + -7.5) equal to 5.361902647 and -5.361902647.

Subproblem 1

x + -7.5 = 5.361902647 Simplifying x + -7.5 = 5.361902647 Reorder the terms: -7.5 + x = 5.361902647 Solving -7.5 + x = 5.361902647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = 5.361902647 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 5.361902647 + 7.5 x = 5.361902647 + 7.5 Combine like terms: 5.361902647 + 7.5 = 12.861902647 x = 12.861902647 Simplifying x = 12.861902647

Subproblem 2

x + -7.5 = -5.361902647 Simplifying x + -7.5 = -5.361902647 Reorder the terms: -7.5 + x = -5.361902647 Solving -7.5 + x = -5.361902647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = -5.361902647 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -5.361902647 + 7.5 x = -5.361902647 + 7.5 Combine like terms: -5.361902647 + 7.5 = 2.138097353 x = 2.138097353 Simplifying x = 2.138097353

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.861902647, 2.138097353}

See similar equations:

| (Y^2)+Y= | | 2/5-4/5x0 | | 3x^2-3.2x-2.4=0 | | P=x+(5x-3)+(7x-4) | | .10(9)+x=.20(9+x) | | 12/(√5-√2) | | 12x^2-11x+32=0 | | 0.40+0.44+0.16+x=1 | | -5(3)-8y=0 | | (4x+7y)(4x+7y)= | | P^2-1/8p-8 | | -5(2)-8y=0 | | 5g-3=1 | | -5(1)-8y=0 | | -3x+5(-1)-7=0 | | 6x-(7x-12)=12 | | z=10+3(x+y)forx | | x-6(-1)=2 | | x+x+475000=600000000 | | x+x+300000=550000000 | | (9+2x)*5=10+5x | | (3/7)x-3/2=-5/3 | | F(x)=-x^3+5x^2-x-5 | | x-1/51/8 | | F(x)=-4x^3-3x^2+2x+1 | | (X+3)(x-1)=24 | | 227=-y+30 | | 161=54-w | | 195-y=41 | | -x^2-4x-5=7 | | -w+76=294 | | 9x+6=8x-10 |

Equations solver categories