=x^2+53x-70

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Solution for =x^2+53x-70 equation:


Simplifying
0 = x2 + 53x + -70

Reorder the terms:
0 = -70 + 53x + x2

Solving
0 = -70 + 53x + x2

Solving for variable 'x'.

Combine like terms: 0 + 70 = 70
70 + -53x + -1x2 = -70 + 53x + x2 + 70 + -53x + -1x2

Reorder the terms:
70 + -53x + -1x2 = -70 + 70 + 53x + -53x + x2 + -1x2

Combine like terms: -70 + 70 = 0
70 + -53x + -1x2 = 0 + 53x + -53x + x2 + -1x2
70 + -53x + -1x2 = 53x + -53x + x2 + -1x2

Combine like terms: 53x + -53x = 0
70 + -53x + -1x2 = 0 + x2 + -1x2
70 + -53x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
70 + -53x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-70 + 53x + x2 = 0

Move the constant term to the right:

Add '70' to each side of the equation.
-70 + 53x + 70 + x2 = 0 + 70

Reorder the terms:
-70 + 70 + 53x + x2 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + 53x + x2 = 0 + 70
53x + x2 = 0 + 70

Combine like terms: 0 + 70 = 70
53x + x2 = 70

The x term is 53x.  Take half its coefficient (26.5).
Square it (702.25) and add it to both sides.

Add '702.25' to each side of the equation.
53x + 702.25 + x2 = 70 + 702.25

Reorder the terms:
702.25 + 53x + x2 = 70 + 702.25

Combine like terms: 70 + 702.25 = 772.25
702.25 + 53x + x2 = 772.25

Factor a perfect square on the left side:
(x + 26.5)(x + 26.5) = 772.25

Calculate the square root of the right side: 27.789386463

Break this problem into two subproblems by setting 
(x + 26.5) equal to 27.789386463 and -27.789386463.

Subproblem 1

x + 26.5 = 27.789386463 Simplifying x + 26.5 = 27.789386463 Reorder the terms: 26.5 + x = 27.789386463 Solving 26.5 + x = 27.789386463 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-26.5' to each side of the equation. 26.5 + -26.5 + x = 27.789386463 + -26.5 Combine like terms: 26.5 + -26.5 = 0.0 0.0 + x = 27.789386463 + -26.5 x = 27.789386463 + -26.5 Combine like terms: 27.789386463 + -26.5 = 1.289386463 x = 1.289386463 Simplifying x = 1.289386463

Subproblem 2

x + 26.5 = -27.789386463 Simplifying x + 26.5 = -27.789386463 Reorder the terms: 26.5 + x = -27.789386463 Solving 26.5 + x = -27.789386463 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-26.5' to each side of the equation. 26.5 + -26.5 + x = -27.789386463 + -26.5 Combine like terms: 26.5 + -26.5 = 0.0 0.0 + x = -27.789386463 + -26.5 x = -27.789386463 + -26.5 Combine like terms: -27.789386463 + -26.5 = -54.289386463 x = -54.289386463 Simplifying x = -54.289386463

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.289386463, -54.289386463}

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