x^2+70x+385=0

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Solution for x^2+70x+385=0 equation:


Simplifying
x2 + 70x + 385 = 0

Reorder the terms:
385 + 70x + x2 = 0

Solving
385 + 70x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-385' to each side of the equation.
385 + 70x + -385 + x2 = 0 + -385

Reorder the terms:
385 + -385 + 70x + x2 = 0 + -385

Combine like terms: 385 + -385 = 0
0 + 70x + x2 = 0 + -385
70x + x2 = 0 + -385

Combine like terms: 0 + -385 = -385
70x + x2 = -385

The x term is 70x.  Take half its coefficient (35).
Square it (1225) and add it to both sides.

Add '1225' to each side of the equation.
70x + 1225 + x2 = -385 + 1225

Reorder the terms:
1225 + 70x + x2 = -385 + 1225

Combine like terms: -385 + 1225 = 840
1225 + 70x + x2 = 840

Factor a perfect square on the left side:
(x + 35)(x + 35) = 840

Calculate the square root of the right side: 28.982753492

Break this problem into two subproblems by setting 
(x + 35) equal to 28.982753492 and -28.982753492.

Subproblem 1

x + 35 = 28.982753492 Simplifying x + 35 = 28.982753492 Reorder the terms: 35 + x = 28.982753492 Solving 35 + x = 28.982753492 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + x = 28.982753492 + -35 Combine like terms: 35 + -35 = 0 0 + x = 28.982753492 + -35 x = 28.982753492 + -35 Combine like terms: 28.982753492 + -35 = -6.017246508 x = -6.017246508 Simplifying x = -6.017246508

Subproblem 2

x + 35 = -28.982753492 Simplifying x + 35 = -28.982753492 Reorder the terms: 35 + x = -28.982753492 Solving 35 + x = -28.982753492 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + x = -28.982753492 + -35 Combine like terms: 35 + -35 = 0 0 + x = -28.982753492 + -35 x = -28.982753492 + -35 Combine like terms: -28.982753492 + -35 = -63.982753492 x = -63.982753492 Simplifying x = -63.982753492

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-6.017246508, -63.982753492}

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