5x^2+12x=-3

Simple and best practice solution for 5x^2+12x=-3 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+12x=-3 equation:


Simplifying
5x2 + 12x = -3

Reorder the terms:
12x + 5x2 = -3

Solving
12x + 5x2 = -3

Solving for variable 'x'.

Reorder the terms:
3 + 12x + 5x2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + 12x + 5x2 = 0

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

Divide each side by '5'.
0.6 + 2.4x + x2 = 0

Move the constant term to the right:

Add '-0.6' to each side of the equation.
0.6 + 2.4x + -0.6 + x2 = 0 + -0.6

Reorder the terms:
0.6 + -0.6 + 2.4x + x2 = 0 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + 2.4x + x2 = 0 + -0.6
2.4x + x2 = 0 + -0.6

Combine like terms: 0 + -0.6 = -0.6
2.4x + x2 = -0.6

The x term is 2.4x.  Take half its coefficient (1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
2.4x + 1.44 + x2 = -0.6 + 1.44

Reorder the terms:
1.44 + 2.4x + x2 = -0.6 + 1.44

Combine like terms: -0.6 + 1.44 = 0.84
1.44 + 2.4x + x2 = 0.84

Factor a perfect square on the left side:
(x + 1.2)(x + 1.2) = 0.84

Calculate the square root of the right side: 0.916515139

Break this problem into two subproblems by setting 
(x + 1.2) equal to 0.916515139 and -0.916515139.

Subproblem 1

x + 1.2 = 0.916515139 Simplifying x + 1.2 = 0.916515139 Reorder the terms: 1.2 + x = 0.916515139 Solving 1.2 + x = 0.916515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + x = 0.916515139 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + x = 0.916515139 + -1.2 x = 0.916515139 + -1.2 Combine like terms: 0.916515139 + -1.2 = -0.283484861 x = -0.283484861 Simplifying x = -0.283484861

Subproblem 2

x + 1.2 = -0.916515139 Simplifying x + 1.2 = -0.916515139 Reorder the terms: 1.2 + x = -0.916515139 Solving 1.2 + x = -0.916515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + x = -0.916515139 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + x = -0.916515139 + -1.2 x = -0.916515139 + -1.2 Combine like terms: -0.916515139 + -1.2 = -2.116515139 x = -2.116515139 Simplifying x = -2.116515139

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.283484861, -2.116515139}

See similar equations:

| 4a+9=14 | | 4*x^2-4*x+2=0 | | 15+(-53)= | | -8-12+14=6 | | y-6-10=10 | | 3x+4=28-x | | 4x+3y+8x+3y= | | (a^2-15a)+56=0 | | 17+x=13 | | 6x-2(7y-12)= | | 5x-2=x-3 | | 2=6x-1 | | (a^2-25a)+56=0 | | 5n-12=-3n+3 | | (-1)-(-5)= | | x+325*r=900 | | 2x^2+20=x^2+9x | | -60-63= | | 13x+2=6x+11 | | 1+3x=x+11 | | (-1)(5)(7)= | | 5x=2x+-6 | | 8x-2(2-x)=2 | | 2(n-6)=-21-7n | | 4x-5=7-2x | | -9*(-62)= | | 2x+3-x=10 | | (x+3y)(x+3y)= | | -2x+6=1 | | -7(1-5x)=-37+5x | | 8ln(x+7)-6lnx= | | x+4.9=6.9 |

Equations solver categories