30x-5x^2=20

Simple and best practice solution for 30x-5x^2=20 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 30x-5x^2=20 equation:


Simplifying
30x + -5x2 = 20

Solving
30x + -5x2 = 20

Solving for variable 'x'.

Reorder the terms:
-20 + 30x + -5x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + 30x + -5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-4 + 6x + -1x2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-4 + 6x + -1x2)' equal to zero and attempt to solve: Simplifying -4 + 6x + -1x2 = 0 Solving -4 + 6x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 4 + -6x + x2 = 0 Move the constant term to the right: Add '-4' to each side of the equation. 4 + -6x + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + -6x + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -6x + x2 = 0 + -4 -6x + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 -6x + x2 = -4 The x term is -6x. Take half its coefficient (-3). Square it (9) and add it to both sides. Add '9' to each side of the equation. -6x + 9 + x2 = -4 + 9 Reorder the terms: 9 + -6x + x2 = -4 + 9 Combine like terms: -4 + 9 = 5 9 + -6x + x2 = 5 Factor a perfect square on the left side: (x + -3)(x + -3) = 5 Calculate the square root of the right side: 2.236067978 Break this problem into two subproblems by setting (x + -3) equal to 2.236067978 and -2.236067978.

Subproblem 1

x + -3 = 2.236067978 Simplifying x + -3 = 2.236067978 Reorder the terms: -3 + x = 2.236067978 Solving -3 + x = 2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 2.236067978 + 3 Combine like terms: -3 + 3 = 0 0 + x = 2.236067978 + 3 x = 2.236067978 + 3 Combine like terms: 2.236067978 + 3 = 5.236067978 x = 5.236067978 Simplifying x = 5.236067978

Subproblem 2

x + -3 = -2.236067978 Simplifying x + -3 = -2.236067978 Reorder the terms: -3 + x = -2.236067978 Solving -3 + x = -2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -2.236067978 + 3 Combine like terms: -3 + 3 = 0 0 + x = -2.236067978 + 3 x = -2.236067978 + 3 Combine like terms: -2.236067978 + 3 = 0.763932022 x = 0.763932022 Simplifying x = 0.763932022

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.236067978, 0.763932022}

Solution

x = {5.236067978, 0.763932022}

See similar equations:

| X-4/5=-3/10 | | -10 = t-7+ -16 | | 25=25+25x | | 10x+4y+8=180 | | X^3=396 | | 31x-3=29x+3 | | 56=(7)(8)(x+5) | | -22=x-6 | | -2/3=2/7u-7/3 | | 450+230x= | | w/7=22.4 | | 9x+7(1)=-12 | | 4d+-13=-49 | | P(x)=ax^2+BX+c | | 21x=3x^2 | | 0=20x^4+20x^3 | | .03x+2=.4(x+1) | | 77=.5(h)(7+4) | | 6x^2y/(-3xy)^2 | | 5x-3=6+15x | | 16-3p=2/3p/5 | | z-385/24=17 | | 8x-2y+14w-5y-6w+3x= | | (x^4)-(5*(x^3))+(3*(x^2))-2*x=-44 | | 3.54/.590909 | | 24=14x | | x^2-2x+y^2+16y-35=0 | | 23x+13y=1 | | 12x-8=4x-2 | | 20-12x-8=9 | | 10j+20=50 | | C=5/9(5-32 |

Equations solver categories