9M^2=90M-49

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Solution for 9M^2=90M-49 equation:


Simplifying
9M2 = 90M + -49

Reorder the terms:
9M2 = -49 + 90M

Solving
9M2 = -49 + 90M

Solving for variable 'M'.

Reorder the terms:
49 + -90M + 9M2 = -49 + 90M + 49 + -90M

Reorder the terms:
49 + -90M + 9M2 = -49 + 49 + 90M + -90M

Combine like terms: -49 + 49 = 0
49 + -90M + 9M2 = 0 + 90M + -90M
49 + -90M + 9M2 = 90M + -90M

Combine like terms: 90M + -90M = 0
49 + -90M + 9M2 = 0

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

Divide each side by '9'.
5.444444444 + -10M + M2 = 0

Move the constant term to the right:

Add '-5.444444444' to each side of the equation.
5.444444444 + -10M + -5.444444444 + M2 = 0 + -5.444444444

Reorder the terms:
5.444444444 + -5.444444444 + -10M + M2 = 0 + -5.444444444

Combine like terms: 5.444444444 + -5.444444444 = 0.000000000
0.000000000 + -10M + M2 = 0 + -5.444444444
-10M + M2 = 0 + -5.444444444

Combine like terms: 0 + -5.444444444 = -5.444444444
-10M + M2 = -5.444444444

The M term is -10M.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10M + 25 + M2 = -5.444444444 + 25

Reorder the terms:
25 + -10M + M2 = -5.444444444 + 25

Combine like terms: -5.444444444 + 25 = 19.555555556
25 + -10M + M2 = 19.555555556

Factor a perfect square on the left side:
(M + -5)(M + -5) = 19.555555556

Calculate the square root of the right side: 4.422166387

Break this problem into two subproblems by setting 
(M + -5) equal to 4.422166387 and -4.422166387.

Subproblem 1

M + -5 = 4.422166387 Simplifying M + -5 = 4.422166387 Reorder the terms: -5 + M = 4.422166387 Solving -5 + M = 4.422166387 Solving for variable 'M'. Move all terms containing M to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + M = 4.422166387 + 5 Combine like terms: -5 + 5 = 0 0 + M = 4.422166387 + 5 M = 4.422166387 + 5 Combine like terms: 4.422166387 + 5 = 9.422166387 M = 9.422166387 Simplifying M = 9.422166387

Subproblem 2

M + -5 = -4.422166387 Simplifying M + -5 = -4.422166387 Reorder the terms: -5 + M = -4.422166387 Solving -5 + M = -4.422166387 Solving for variable 'M'. Move all terms containing M to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + M = -4.422166387 + 5 Combine like terms: -5 + 5 = 0 0 + M = -4.422166387 + 5 M = -4.422166387 + 5 Combine like terms: -4.422166387 + 5 = 0.577833613 M = 0.577833613 Simplifying M = 0.577833613

Solution

The solution to the problem is based on the solutions from the subproblems. M = {9.422166387, 0.577833613}

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