-0.02x^2+1.4x-12=0

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Solution for -0.02x^2+1.4x-12=0 equation:


Simplifying
-0.02x2 + 1.4x + -12 = 0

Reorder the terms:
-12 + 1.4x + -0.02x2 = 0

Solving
-12 + 1.4x + -0.02x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.02 the coefficient of the squared term: 

Divide each side by '-0.02'.
600 + -70x + x2 = 0

Move the constant term to the right:

Add '-600' to each side of the equation.
600 + -70x + -600 + x2 = 0 + -600

Reorder the terms:
600 + -600 + -70x + x2 = 0 + -600

Combine like terms: 600 + -600 = 0
0 + -70x + x2 = 0 + -600
-70x + x2 = 0 + -600

Combine like terms: 0 + -600 = -600
-70x + x2 = -600

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 = -600 + 1225

Reorder the terms:
1225 + -70x + x2 = -600 + 1225

Combine like terms: -600 + 1225 = 625
1225 + -70x + x2 = 625

Factor a perfect square on the left side:
(x + -35)(x + -35) = 625

Calculate the square root of the right side: 25

Break this problem into two subproblems by setting 
(x + -35) equal to 25 and -25.

Subproblem 1

x + -35 = 25 Simplifying x + -35 = 25 Reorder the terms: -35 + x = 25 Solving -35 + x = 25 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 = 25 + 35 Combine like terms: -35 + 35 = 0 0 + x = 25 + 35 x = 25 + 35 Combine like terms: 25 + 35 = 60 x = 60 Simplifying x = 60

Subproblem 2

x + -35 = -25 Simplifying x + -35 = -25 Reorder the terms: -35 + x = -25 Solving -35 + x = -25 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 = -25 + 35 Combine like terms: -35 + 35 = 0 0 + x = -25 + 35 x = -25 + 35 Combine like terms: -25 + 35 = 10 x = 10 Simplifying x = 10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {60, 10}

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