-25x^2-60x=-31

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Solution for -25x^2-60x=-31 equation:


Simplifying
-25x2 + -60x = -31

Reorder the terms:
-60x + -25x2 = -31

Solving
-60x + -25x2 = -31

Solving for variable 'x'.

Reorder the terms:
31 + -60x + -25x2 = -31 + 31

Combine like terms: -31 + 31 = 0
31 + -60x + -25x2 = 0

Begin completing the square.  Divide all terms by
-25 the coefficient of the squared term: 

Divide each side by '-25'.
-1.24 + 2.4x + x2 = 0

Move the constant term to the right:

Add '1.24' to each side of the equation.
-1.24 + 2.4x + 1.24 + x2 = 0 + 1.24

Reorder the terms:
-1.24 + 1.24 + 2.4x + x2 = 0 + 1.24

Combine like terms: -1.24 + 1.24 = 0.00
0.00 + 2.4x + x2 = 0 + 1.24
2.4x + x2 = 0 + 1.24

Combine like terms: 0 + 1.24 = 1.24
2.4x + x2 = 1.24

The x term is 2.4x.  Take half its coefficient (1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
2.4x + 1.44 + x2 = 1.24 + 1.44

Reorder the terms:
1.44 + 2.4x + x2 = 1.24 + 1.44

Combine like terms: 1.24 + 1.44 = 2.68
1.44 + 2.4x + x2 = 2.68

Factor a perfect square on the left side:
(x + 1.2)(x + 1.2) = 2.68

Calculate the square root of the right side: 1.637070554

Break this problem into two subproblems by setting 
(x + 1.2) equal to 1.637070554 and -1.637070554.

Subproblem 1

x + 1.2 = 1.637070554 Simplifying x + 1.2 = 1.637070554 Reorder the terms: 1.2 + x = 1.637070554 Solving 1.2 + x = 1.637070554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + x = 1.637070554 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + x = 1.637070554 + -1.2 x = 1.637070554 + -1.2 Combine like terms: 1.637070554 + -1.2 = 0.437070554 x = 0.437070554 Simplifying x = 0.437070554

Subproblem 2

x + 1.2 = -1.637070554 Simplifying x + 1.2 = -1.637070554 Reorder the terms: 1.2 + x = -1.637070554 Solving 1.2 + x = -1.637070554 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + x = -1.637070554 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + x = -1.637070554 + -1.2 x = -1.637070554 + -1.2 Combine like terms: -1.637070554 + -1.2 = -2.837070554 x = -2.837070554 Simplifying x = -2.837070554

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.437070554, -2.837070554}

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