7=(X*.25)+[(X*.25)*.065]*X

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Solution for 7=(X*.25)+[(X*.25)*.065]*X equation:


Simplifying
7 = (X * 0.25) + [(X * 0.25) * 0.065] * X

Reorder the terms for easier multiplication:
7 = (0.25X) + [(X * 0.25) * 0.065] * X

Reorder the terms for easier multiplication:
7 = (0.25X) + [(0.25X) * 0.065] * X

Remove parenthesis around (0.25X)
7 = (0.25X) + [0.25X * 0.065] * X

Reorder the terms for easier multiplication:
7 = (0.25X) + [0.25 * 0.065X] * X

Multiply 0.25 * 0.065
7 = (0.25X) + [0.01625X] * X

Remove brackets around [0.01625X]
7 = (0.25X) + 0.01625X * X

Multiply X * X
7 = (0.25X) + 0.01625X2

Solving
7 = (0.25X) + 0.01625X2

Solving for variable 'X'.

Reorder the terms:
7 + (-0.25X) + -0.01625X2 = (0.25X) + (-0.25X) + 0.01625X2 + -0.01625X2

Combine like terms: (0.25X) + (-0.25X) = 0.00
7 + (-0.25X) + -0.01625X2 = 0.00 + 0.01625X2 + -0.01625X2
7 + (-0.25X) + -0.01625X2 = 0.01625X2 + -0.01625X2

Combine like terms: 0.01625X2 + -0.01625X2 = 0.00000
7 + (-0.25X) + -0.01625X2 = 0.00000

Begin completing the square.  Divide all terms by
-0.01625 the coefficient of the squared term: 

Divide each side by '-0.01625'.
-430.7692308 + (15.38461538X) + X2 = 0

Move the constant term to the right:

Add '430.7692308' to each side of the equation.
-430.7692308 + (15.38461538X) + 430.7692308 + X2 = 0 + 430.7692308

Reorder the terms:
-430.7692308 + 430.7692308 + (15.38461538X) + X2 = 0 + 430.7692308

Combine like terms: -430.7692308 + 430.7692308 = 0.0000000
0.0000000 + (15.38461538X) + X2 = 0 + 430.7692308
(15.38461538X) + X2 = 0 + 430.7692308

Combine like terms: 0 + 430.7692308 = 430.7692308
(15.38461538X) + X2 = 430.7692308

The X term is (15.38461538X).  Take half its coefficient (7.69230769).
Square it (59.17159760) and add it to both sides.

Add '59.17159760' to each side of the equation.
(15.38461538X) + 59.17159760 + X2 = 430.7692308 + 59.17159760

Reorder the terms:
59.17159760 + (15.38461538X) + X2 = 430.7692308 + 59.17159760

Combine like terms: 430.7692308 + 59.17159760 = 489.9408284
59.17159760 + (15.38461538X) + X2 = 489.9408284

Factor a perfect square on the left side:
(X + 7.69230769)(X + 7.69230769) = 489.9408284

Calculate the square root of the right side: 22.134607031

Break this problem into two subproblems by setting 
(X + 7.69230769) equal to 22.134607031 and -22.134607031.

Subproblem 1

X + 7.69230769 = 22.134607031 Simplifying X + 7.69230769 = 22.134607031 Reorder the terms: 7.69230769 + X = 22.134607031 Solving 7.69230769 + X = 22.134607031 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-7.69230769' to each side of the equation. 7.69230769 + -7.69230769 + X = 22.134607031 + -7.69230769 Combine like terms: 7.69230769 + -7.69230769 = 0.00000000 0.00000000 + X = 22.134607031 + -7.69230769 X = 22.134607031 + -7.69230769 Combine like terms: 22.134607031 + -7.69230769 = 14.442299341 X = 14.442299341 Simplifying X = 14.442299341

Subproblem 2

X + 7.69230769 = -22.134607031 Simplifying X + 7.69230769 = -22.134607031 Reorder the terms: 7.69230769 + X = -22.134607031 Solving 7.69230769 + X = -22.134607031 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-7.69230769' to each side of the equation. 7.69230769 + -7.69230769 + X = -22.134607031 + -7.69230769 Combine like terms: 7.69230769 + -7.69230769 = 0.00000000 0.00000000 + X = -22.134607031 + -7.69230769 X = -22.134607031 + -7.69230769 Combine like terms: -22.134607031 + -7.69230769 = -29.826914721 X = -29.826914721 Simplifying X = -29.826914721

Solution

The solution to the problem is based on the solutions from the subproblems. X = {14.442299341, -29.826914721}

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