15x^2+14x-18=0

Simple and best practice solution for 15x^2+14x-18=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 15x^2+14x-18=0 equation:


Simplifying
15x2 + 14x + -18 = 0

Reorder the terms:
-18 + 14x + 15x2 = 0

Solving
-18 + 14x + 15x2 = 0

Solving for variable 'x'.

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

Divide each side by '15'.
-1.2 + 0.9333333333x + x2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + 0.9333333333x + 1.2 + x2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + 0.9333333333x + x2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 0.9333333333x + x2 = 0 + 1.2
0.9333333333x + x2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
0.9333333333x + x2 = 1.2

The x term is 0.9333333333x.  Take half its coefficient (0.4666666667).
Square it (0.2177777778) and add it to both sides.

Add '0.2177777778' to each side of the equation.
0.9333333333x + 0.2177777778 + x2 = 1.2 + 0.2177777778

Reorder the terms:
0.2177777778 + 0.9333333333x + x2 = 1.2 + 0.2177777778

Combine like terms: 1.2 + 0.2177777778 = 1.4177777778
0.2177777778 + 0.9333333333x + x2 = 1.4177777778

Factor a perfect square on the left side:
(x + 0.4666666667)(x + 0.4666666667) = 1.4177777778

Calculate the square root of the right side: 1.19070474

Break this problem into two subproblems by setting 
(x + 0.4666666667) equal to 1.19070474 and -1.19070474.

Subproblem 1

x + 0.4666666667 = 1.19070474 Simplifying x + 0.4666666667 = 1.19070474 Reorder the terms: 0.4666666667 + x = 1.19070474 Solving 0.4666666667 + x = 1.19070474 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4666666667' to each side of the equation. 0.4666666667 + -0.4666666667 + x = 1.19070474 + -0.4666666667 Combine like terms: 0.4666666667 + -0.4666666667 = 0.0000000000 0.0000000000 + x = 1.19070474 + -0.4666666667 x = 1.19070474 + -0.4666666667 Combine like terms: 1.19070474 + -0.4666666667 = 0.7240380733 x = 0.7240380733 Simplifying x = 0.7240380733

Subproblem 2

x + 0.4666666667 = -1.19070474 Simplifying x + 0.4666666667 = -1.19070474 Reorder the terms: 0.4666666667 + x = -1.19070474 Solving 0.4666666667 + x = -1.19070474 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4666666667' to each side of the equation. 0.4666666667 + -0.4666666667 + x = -1.19070474 + -0.4666666667 Combine like terms: 0.4666666667 + -0.4666666667 = 0.0000000000 0.0000000000 + x = -1.19070474 + -0.4666666667 x = -1.19070474 + -0.4666666667 Combine like terms: -1.19070474 + -0.4666666667 = -1.6573714067 x = -1.6573714067 Simplifying x = -1.6573714067

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7240380733, -1.6573714067}

See similar equations:

| 3(1)+5y=4 | | 2x^2-16=130 | | 5x-4+2x=-19+9x-4+3x-6 | | 4+3a=13 | | 3(0)+5y=4 | | X^5+2x^4-8x=0 | | 8(n+5)= | | X^5+2x^4-8x+a=0 | | log(y)(9x)=4 | | (-5/7)-(-2/7)= | | 5(-2x)-6=3(x+8)-4 | | log[6](5x)+log[6](7)=2 | | 8+6=x | | 1f-18=12 | | 5x-2(x-4)=4x+1 | | -5/6i | | -3(v+5)=v | | 4(2x-3)+5=6x+23 | | -x+258=181 | | 6cosx=3 | | F-18=12 | | 4+2v=-8 | | For-18=12 | | 15+c=15 | | -w+163=261 | | 6=0(-7)+b | | -6-8n+8n= | | 36=3v-15 | | 207=279-u | | 1/19.-20 | | 6x+19=39-4 | | 4x+3*6x-14=15-2x |

Equations solver categories