74=25x^2-5x

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Solution for 74=25x^2-5x equation:


Simplifying
74 = 25x2 + -5x

Reorder the terms:
74 = -5x + 25x2

Solving
74 = -5x + 25x2

Solving for variable 'x'.

Reorder the terms:
74 + 5x + -25x2 = -5x + 5x + 25x2 + -25x2

Combine like terms: -5x + 5x = 0
74 + 5x + -25x2 = 0 + 25x2 + -25x2
74 + 5x + -25x2 = 25x2 + -25x2

Combine like terms: 25x2 + -25x2 = 0
74 + 5x + -25x2 = 0

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

Divide each side by '-25'.
-2.96 + -0.2x + x2 = 0

Move the constant term to the right:

Add '2.96' to each side of the equation.
-2.96 + -0.2x + 2.96 + x2 = 0 + 2.96

Reorder the terms:
-2.96 + 2.96 + -0.2x + x2 = 0 + 2.96

Combine like terms: -2.96 + 2.96 = 0.00
0.00 + -0.2x + x2 = 0 + 2.96
-0.2x + x2 = 0 + 2.96

Combine like terms: 0 + 2.96 = 2.96
-0.2x + x2 = 2.96

The x term is -0.2x.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2x + 0.01 + x2 = 2.96 + 0.01

Reorder the terms:
0.01 + -0.2x + x2 = 2.96 + 0.01

Combine like terms: 2.96 + 0.01 = 2.97
0.01 + -0.2x + x2 = 2.97

Factor a perfect square on the left side:
(x + -0.1)(x + -0.1) = 2.97

Calculate the square root of the right side: 1.723368794

Break this problem into two subproblems by setting 
(x + -0.1) equal to 1.723368794 and -1.723368794.

Subproblem 1

x + -0.1 = 1.723368794 Simplifying x + -0.1 = 1.723368794 Reorder the terms: -0.1 + x = 1.723368794 Solving -0.1 + x = 1.723368794 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = 1.723368794 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = 1.723368794 + 0.1 x = 1.723368794 + 0.1 Combine like terms: 1.723368794 + 0.1 = 1.823368794 x = 1.823368794 Simplifying x = 1.823368794

Subproblem 2

x + -0.1 = -1.723368794 Simplifying x + -0.1 = -1.723368794 Reorder the terms: -0.1 + x = -1.723368794 Solving -0.1 + x = -1.723368794 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = -1.723368794 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = -1.723368794 + 0.1 x = -1.723368794 + 0.1 Combine like terms: -1.723368794 + 0.1 = -1.623368794 x = -1.623368794 Simplifying x = -1.623368794

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.823368794, -1.623368794}

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