3x-5x^2=-4

Simple and best practice solution for 3x-5x^2=-4 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 3x-5x^2=-4 equation:


Simplifying
3x + -5x2 = -4

Solving
3x + -5x2 = -4

Solving for variable 'x'.

Reorder the terms:
4 + 3x + -5x2 = -4 + 4

Combine like terms: -4 + 4 = 0
4 + 3x + -5x2 = 0

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

Divide each side by '-5'.
-0.8 + -0.6x + x2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -0.6x + 0.8 + x2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -0.6x + x2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -0.6x + x2 = 0 + 0.8
-0.6x + x2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-0.6x + x2 = 0.8

The x term is -0.6x.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6x + 0.09 + x2 = 0.8 + 0.09

Reorder the terms:
0.09 + -0.6x + x2 = 0.8 + 0.09

Combine like terms: 0.8 + 0.09 = 0.89
0.09 + -0.6x + x2 = 0.89

Factor a perfect square on the left side:
(x + -0.3)(x + -0.3) = 0.89

Calculate the square root of the right side: 0.943398113

Break this problem into two subproblems by setting 
(x + -0.3) equal to 0.943398113 and -0.943398113.

Subproblem 1

x + -0.3 = 0.943398113 Simplifying x + -0.3 = 0.943398113 Reorder the terms: -0.3 + x = 0.943398113 Solving -0.3 + x = 0.943398113 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = 0.943398113 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = 0.943398113 + 0.3 x = 0.943398113 + 0.3 Combine like terms: 0.943398113 + 0.3 = 1.243398113 x = 1.243398113 Simplifying x = 1.243398113

Subproblem 2

x + -0.3 = -0.943398113 Simplifying x + -0.3 = -0.943398113 Reorder the terms: -0.3 + x = -0.943398113 Solving -0.3 + x = -0.943398113 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = -0.943398113 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = -0.943398113 + 0.3 x = -0.943398113 + 0.3 Combine like terms: -0.943398113 + 0.3 = -0.643398113 x = -0.643398113 Simplifying x = -0.643398113

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.243398113, -0.643398113}

See similar equations:

| 0.5x*0.2x=0.25 | | 25.39=28.89-c | | 25.39= | | .2y-5=7y-5 | | 5(2x+1.2)=(x-1.5) | | 3(2x+5)-8=2(X+24)-2x+10 | | -6.5-x=13.4 | | 4x^4-8x^2-12=0 | | 9/7j=36 | | 142+38=180 | | ydx+(x+sqrt(xy))dy=0 | | (3x/y)^4 | | 4xsquared-6x=0 | | 98/u=7 | | 58+3x+90=180 | | x+0.0525x=3500 | | x+0.525x=3500 | | N+-10.80=-35.40 | | x+0.525x=9400 | | y(7y+9)=0 | | 6-8=28 | | -24.6+-10.80=-35.40 | | -8v+5(v-8)=-37 | | 4/3x=2x-4 | | -18=3(z-4) | | [(1.2/x)^12]-[(1.2/x)^6]=-0.8 | | -44.5=p-15.9 | | 30+19x+13+90=180 | | [(1.2/x)^12]-[(1.2/x)^6] | | 6(2/3x) | | 0.4x+6=2x+-8 | | 10y^2-30y+25=25 |

Equations solver categories