5x^2+9x-2=24

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Solution for 5x^2+9x-2=24 equation:


Simplifying
5x2 + 9x + -2 = 24

Reorder the terms:
-2 + 9x + 5x2 = 24

Solving
-2 + 9x + 5x2 = 24

Solving for variable 'x'.

Reorder the terms:
-2 + -24 + 9x + 5x2 = 24 + -24

Combine like terms: -2 + -24 = -26
-26 + 9x + 5x2 = 24 + -24

Combine like terms: 24 + -24 = 0
-26 + 9x + 5x2 = 0

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

Divide each side by '5'.
-5.2 + 1.8x + x2 = 0

Move the constant term to the right:

Add '5.2' to each side of the equation.
-5.2 + 1.8x + 5.2 + x2 = 0 + 5.2

Reorder the terms:
-5.2 + 5.2 + 1.8x + x2 = 0 + 5.2

Combine like terms: -5.2 + 5.2 = 0.0
0.0 + 1.8x + x2 = 0 + 5.2
1.8x + x2 = 0 + 5.2

Combine like terms: 0 + 5.2 = 5.2
1.8x + x2 = 5.2

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 = 5.2 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 5.2 + 0.81

Combine like terms: 5.2 + 0.81 = 6.01
0.81 + 1.8x + x2 = 6.01

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 6.01

Calculate the square root of the right side: 2.451530134

Break this problem into two subproblems by setting 
(x + 0.9) equal to 2.451530134 and -2.451530134.

Subproblem 1

x + 0.9 = 2.451530134 Simplifying x + 0.9 = 2.451530134 Reorder the terms: 0.9 + x = 2.451530134 Solving 0.9 + x = 2.451530134 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 = 2.451530134 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 2.451530134 + -0.9 x = 2.451530134 + -0.9 Combine like terms: 2.451530134 + -0.9 = 1.551530134 x = 1.551530134 Simplifying x = 1.551530134

Subproblem 2

x + 0.9 = -2.451530134 Simplifying x + 0.9 = -2.451530134 Reorder the terms: 0.9 + x = -2.451530134 Solving 0.9 + x = -2.451530134 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 = -2.451530134 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -2.451530134 + -0.9 x = -2.451530134 + -0.9 Combine like terms: -2.451530134 + -0.9 = -3.351530134 x = -3.351530134 Simplifying x = -3.351530134

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.551530134, -3.351530134}

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