9n-10n^2+10=

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Solution for 9n-10n^2+10= equation:


Simplifying
9n + -10n2 + 10 = 0

Reorder the terms:
10 + 9n + -10n2 = 0

Solving
10 + 9n + -10n2 = 0

Solving for variable 'n'.

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
-1 + -0.9n + n2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.9n + 1 + n2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.9n + n2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.9n + n2 = 0 + 1
-0.9n + n2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.9n + n2 = 1

The n term is -0.9n.  Take half its coefficient (-0.45).
Square it (0.2025) and add it to both sides.

Add '0.2025' to each side of the equation.
-0.9n + 0.2025 + n2 = 1 + 0.2025

Reorder the terms:
0.2025 + -0.9n + n2 = 1 + 0.2025

Combine like terms: 1 + 0.2025 = 1.2025
0.2025 + -0.9n + n2 = 1.2025

Factor a perfect square on the left side:
(n + -0.45)(n + -0.45) = 1.2025

Calculate the square root of the right side: 1.09658561

Break this problem into two subproblems by setting 
(n + -0.45) equal to 1.09658561 and -1.09658561.

Subproblem 1

n + -0.45 = 1.09658561 Simplifying n + -0.45 = 1.09658561 Reorder the terms: -0.45 + n = 1.09658561 Solving -0.45 + n = 1.09658561 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.45' to each side of the equation. -0.45 + 0.45 + n = 1.09658561 + 0.45 Combine like terms: -0.45 + 0.45 = 0.00 0.00 + n = 1.09658561 + 0.45 n = 1.09658561 + 0.45 Combine like terms: 1.09658561 + 0.45 = 1.54658561 n = 1.54658561 Simplifying n = 1.54658561

Subproblem 2

n + -0.45 = -1.09658561 Simplifying n + -0.45 = -1.09658561 Reorder the terms: -0.45 + n = -1.09658561 Solving -0.45 + n = -1.09658561 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.45' to each side of the equation. -0.45 + 0.45 + n = -1.09658561 + 0.45 Combine like terms: -0.45 + 0.45 = 0.00 0.00 + n = -1.09658561 + 0.45 n = -1.09658561 + 0.45 Combine like terms: -1.09658561 + 0.45 = -0.64658561 n = -0.64658561 Simplifying n = -0.64658561

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.54658561, -0.64658561}

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