5x^2=3-9x

Simple and best practice solution for 5x^2=3-9x 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=3-9x equation:


Simplifying
5x2 = 3 + -9x

Solving
5x2 = 3 + -9x

Solving for variable 'x'.

Reorder the terms:
-3 + 9x + 5x2 = 3 + -9x + -3 + 9x

Reorder the terms:
-3 + 9x + 5x2 = 3 + -3 + -9x + 9x

Combine like terms: 3 + -3 = 0
-3 + 9x + 5x2 = 0 + -9x + 9x
-3 + 9x + 5x2 = -9x + 9x

Combine like terms: -9x + 9x = 0
-3 + 9x + 5x2 = 0

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

Divide each side by '5'.
-0.6 + 1.8x + x2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + 1.8x + 0.6 + x2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + 1.8x + x2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + 1.8x + x2 = 0 + 0.6
1.8x + x2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
1.8x + x2 = 0.6

The x term is 1.8x.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.8x + 0.81 + x2 = 0.6 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 0.6 + 0.81

Combine like terms: 0.6 + 0.81 = 1.41
0.81 + 1.8x + x2 = 1.41

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 1.41

Calculate the square root of the right side: 1.187434209

Break this problem into two subproblems by setting 
(x + 0.9) equal to 1.187434209 and -1.187434209.

Subproblem 1

x + 0.9 = 1.187434209 Simplifying x + 0.9 = 1.187434209 Reorder the terms: 0.9 + x = 1.187434209 Solving 0.9 + x = 1.187434209 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 1.187434209 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 1.187434209 + -0.9 x = 1.187434209 + -0.9 Combine like terms: 1.187434209 + -0.9 = 0.287434209 x = 0.287434209 Simplifying x = 0.287434209

Subproblem 2

x + 0.9 = -1.187434209 Simplifying x + 0.9 = -1.187434209 Reorder the terms: 0.9 + x = -1.187434209 Solving 0.9 + x = -1.187434209 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -1.187434209 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -1.187434209 + -0.9 x = -1.187434209 + -0.9 Combine like terms: -1.187434209 + -0.9 = -2.087434209 x = -2.087434209 Simplifying x = -2.087434209

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.287434209, -2.087434209}

See similar equations:

| -5+1/2a=-4 | | x+3=7-6x | | 1/3b=6 | | 2(x-4)=x+2 | | 3y-8=-y | | 7x+1=6x-4 | | (-8)(1/8x)(-9) | | 13c-d= | | ln(-3x-1)-ln(7)=2 | | 3+4y=(26-5y)/3 | | 0.4x-0.2(3)=3 | | 4x+9=3*x | | -17(-n+1)= | | 2x-1/6+x+3/3=5/2 | | 53(x+11)= | | -1(r+27)= | | -19(v-1)= | | 2x(5x-3)= | | 1-(1/(x+1)^2)=0 | | -16(c+45)= | | 3x/2-6=9 | | 7*100=3n | | -18(-q-5)= | | 3x-1=19-x | | -1/((x+1)^2)=0 | | 3/7x+3-x+3 | | 33(d+4)= | | 3p+4=7+2p | | x+x+12=202 | | -20(19-a)= | | X=-4+y | | (4-j)(-1+4j)= |

Equations solver categories