x^2+28x-770=0

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Solution for x^2+28x-770=0 equation:


Simplifying
x2 + 28x + -770 = 0

Reorder the terms:
-770 + 28x + x2 = 0

Solving
-770 + 28x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '770' to each side of the equation.
-770 + 28x + 770 + x2 = 0 + 770

Reorder the terms:
-770 + 770 + 28x + x2 = 0 + 770

Combine like terms: -770 + 770 = 0
0 + 28x + x2 = 0 + 770
28x + x2 = 0 + 770

Combine like terms: 0 + 770 = 770
28x + x2 = 770

The x term is 28x.  Take half its coefficient (14).
Square it (196) and add it to both sides.

Add '196' to each side of the equation.
28x + 196 + x2 = 770 + 196

Reorder the terms:
196 + 28x + x2 = 770 + 196

Combine like terms: 770 + 196 = 966
196 + 28x + x2 = 966

Factor a perfect square on the left side:
(x + 14)(x + 14) = 966

Calculate the square root of the right side: 31.080540536

Break this problem into two subproblems by setting 
(x + 14) equal to 31.080540536 and -31.080540536.

Subproblem 1

x + 14 = 31.080540536 Simplifying x + 14 = 31.080540536 Reorder the terms: 14 + x = 31.080540536 Solving 14 + x = 31.080540536 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + x = 31.080540536 + -14 Combine like terms: 14 + -14 = 0 0 + x = 31.080540536 + -14 x = 31.080540536 + -14 Combine like terms: 31.080540536 + -14 = 17.080540536 x = 17.080540536 Simplifying x = 17.080540536

Subproblem 2

x + 14 = -31.080540536 Simplifying x + 14 = -31.080540536 Reorder the terms: 14 + x = -31.080540536 Solving 14 + x = -31.080540536 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + x = -31.080540536 + -14 Combine like terms: 14 + -14 = 0 0 + x = -31.080540536 + -14 x = -31.080540536 + -14 Combine like terms: -31.080540536 + -14 = -45.080540536 x = -45.080540536 Simplifying x = -45.080540536

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.080540536, -45.080540536}

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