10x^2+29x-42=0

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Solution for 10x^2+29x-42=0 equation:


Simplifying
10x2 + 29x + -42 = 0

Reorder the terms:
-42 + 29x + 10x2 = 0

Solving
-42 + 29x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-4.2 + 2.9x + x2 = 0

Move the constant term to the right:

Add '4.2' to each side of the equation.
-4.2 + 2.9x + 4.2 + x2 = 0 + 4.2

Reorder the terms:
-4.2 + 4.2 + 2.9x + x2 = 0 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + 2.9x + x2 = 0 + 4.2
2.9x + x2 = 0 + 4.2

Combine like terms: 0 + 4.2 = 4.2
2.9x + x2 = 4.2

The x term is 2.9x.  Take half its coefficient (1.45).
Square it (2.1025) and add it to both sides.

Add '2.1025' to each side of the equation.
2.9x + 2.1025 + x2 = 4.2 + 2.1025

Reorder the terms:
2.1025 + 2.9x + x2 = 4.2 + 2.1025

Combine like terms: 4.2 + 2.1025 = 6.3025
2.1025 + 2.9x + x2 = 6.3025

Factor a perfect square on the left side:
(x + 1.45)(x + 1.45) = 6.3025

Calculate the square root of the right side: 2.510478042

Break this problem into two subproblems by setting 
(x + 1.45) equal to 2.510478042 and -2.510478042.

Subproblem 1

x + 1.45 = 2.510478042 Simplifying x + 1.45 = 2.510478042 Reorder the terms: 1.45 + x = 2.510478042 Solving 1.45 + x = 2.510478042 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.45' to each side of the equation. 1.45 + -1.45 + x = 2.510478042 + -1.45 Combine like terms: 1.45 + -1.45 = 0.00 0.00 + x = 2.510478042 + -1.45 x = 2.510478042 + -1.45 Combine like terms: 2.510478042 + -1.45 = 1.060478042 x = 1.060478042 Simplifying x = 1.060478042

Subproblem 2

x + 1.45 = -2.510478042 Simplifying x + 1.45 = -2.510478042 Reorder the terms: 1.45 + x = -2.510478042 Solving 1.45 + x = -2.510478042 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.45' to each side of the equation. 1.45 + -1.45 + x = -2.510478042 + -1.45 Combine like terms: 1.45 + -1.45 = 0.00 0.00 + x = -2.510478042 + -1.45 x = -2.510478042 + -1.45 Combine like terms: -2.510478042 + -1.45 = -3.960478042 x = -3.960478042 Simplifying x = -3.960478042

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.060478042, -3.960478042}

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