5x^2+6x=70

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Solution for 5x^2+6x=70 equation:


Simplifying
5x2 + 6x = 70

Reorder the terms:
6x + 5x2 = 70

Solving
6x + 5x2 = 70

Solving for variable 'x'.

Reorder the terms:
-70 + 6x + 5x2 = 70 + -70

Combine like terms: 70 + -70 = 0
-70 + 6x + 5x2 = 0

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

Divide each side by '5'.
-14 + 1.2x + x2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 1.2x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + 1.2x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 1.2x + x2 = 0 + 14
1.2x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
1.2x + x2 = 14

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = 14 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = 14 + 0.36

Combine like terms: 14 + 0.36 = 14.36
0.36 + 1.2x + x2 = 14.36

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 14.36

Calculate the square root of the right side: 3.789459064

Break this problem into two subproblems by setting 
(x + 0.6) equal to 3.789459064 and -3.789459064.

Subproblem 1

x + 0.6 = 3.789459064 Simplifying x + 0.6 = 3.789459064 Reorder the terms: 0.6 + x = 3.789459064 Solving 0.6 + x = 3.789459064 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 3.789459064 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 3.789459064 + -0.6 x = 3.789459064 + -0.6 Combine like terms: 3.789459064 + -0.6 = 3.189459064 x = 3.189459064 Simplifying x = 3.189459064

Subproblem 2

x + 0.6 = -3.789459064 Simplifying x + 0.6 = -3.789459064 Reorder the terms: 0.6 + x = -3.789459064 Solving 0.6 + x = -3.789459064 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -3.789459064 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -3.789459064 + -0.6 x = -3.789459064 + -0.6 Combine like terms: -3.789459064 + -0.6 = -4.389459064 x = -4.389459064 Simplifying x = -4.389459064

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.189459064, -4.389459064}

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