(3x^2+5x)+(x^2-29)=

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Solution for (3x^2+5x)+(x^2-29)= equation:


Simplifying
(3x2 + 5x) + (x2 + -29) = 0

Reorder the terms:
(5x + 3x2) + (x2 + -29) = 0

Remove parenthesis around (5x + 3x2)
5x + 3x2 + (x2 + -29) = 0

Reorder the terms:
5x + 3x2 + (-29 + x2) = 0

Remove parenthesis around (-29 + x2)
5x + 3x2 + -29 + x2 = 0

Reorder the terms:
-29 + 5x + 3x2 + x2 = 0

Combine like terms: 3x2 + x2 = 4x2
-29 + 5x + 4x2 = 0

Solving
-29 + 5x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-7.25 + 1.25x + x2 = 0

Move the constant term to the right:

Add '7.25' to each side of the equation.
-7.25 + 1.25x + 7.25 + x2 = 0 + 7.25

Reorder the terms:
-7.25 + 7.25 + 1.25x + x2 = 0 + 7.25

Combine like terms: -7.25 + 7.25 = 0.00
0.00 + 1.25x + x2 = 0 + 7.25
1.25x + x2 = 0 + 7.25

Combine like terms: 0 + 7.25 = 7.25
1.25x + x2 = 7.25

The x term is 1.25x.  Take half its coefficient (0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
1.25x + 0.390625 + x2 = 7.25 + 0.390625

Reorder the terms:
0.390625 + 1.25x + x2 = 7.25 + 0.390625

Combine like terms: 7.25 + 0.390625 = 7.640625
0.390625 + 1.25x + x2 = 7.640625

Factor a perfect square on the left side:
(x + 0.625)(x + 0.625) = 7.640625

Calculate the square root of the right side: 2.764168048

Break this problem into two subproblems by setting 
(x + 0.625) equal to 2.764168048 and -2.764168048.

Subproblem 1

x + 0.625 = 2.764168048 Simplifying x + 0.625 = 2.764168048 Reorder the terms: 0.625 + x = 2.764168048 Solving 0.625 + x = 2.764168048 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = 2.764168048 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = 2.764168048 + -0.625 x = 2.764168048 + -0.625 Combine like terms: 2.764168048 + -0.625 = 2.139168048 x = 2.139168048 Simplifying x = 2.139168048

Subproblem 2

x + 0.625 = -2.764168048 Simplifying x + 0.625 = -2.764168048 Reorder the terms: 0.625 + x = -2.764168048 Solving 0.625 + x = -2.764168048 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = -2.764168048 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = -2.764168048 + -0.625 x = -2.764168048 + -0.625 Combine like terms: -2.764168048 + -0.625 = -3.389168048 x = -3.389168048 Simplifying x = -3.389168048

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.139168048, -3.389168048}

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