3p^2-15p+7=

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Solution for 3p^2-15p+7= equation:


Simplifying
3p2 + -15p + 7 = 0

Reorder the terms:
7 + -15p + 3p2 = 0

Solving
7 + -15p + 3p2 = 0

Solving for variable 'p'.

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

Divide each side by '3'.
2.333333333 + -5p + p2 = 0

Move the constant term to the right:

Add '-2.333333333' to each side of the equation.
2.333333333 + -5p + -2.333333333 + p2 = 0 + -2.333333333

Reorder the terms:
2.333333333 + -2.333333333 + -5p + p2 = 0 + -2.333333333

Combine like terms: 2.333333333 + -2.333333333 = 0.000000000
0.000000000 + -5p + p2 = 0 + -2.333333333
-5p + p2 = 0 + -2.333333333

Combine like terms: 0 + -2.333333333 = -2.333333333
-5p + p2 = -2.333333333

The p term is -5p.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5p + 6.25 + p2 = -2.333333333 + 6.25

Reorder the terms:
6.25 + -5p + p2 = -2.333333333 + 6.25

Combine like terms: -2.333333333 + 6.25 = 3.916666667
6.25 + -5p + p2 = 3.916666667

Factor a perfect square on the left side:
(p + -2.5)(p + -2.5) = 3.916666667

Calculate the square root of the right side: 1.979057015

Break this problem into two subproblems by setting 
(p + -2.5) equal to 1.979057015 and -1.979057015.

Subproblem 1

p + -2.5 = 1.979057015 Simplifying p + -2.5 = 1.979057015 Reorder the terms: -2.5 + p = 1.979057015 Solving -2.5 + p = 1.979057015 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + p = 1.979057015 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + p = 1.979057015 + 2.5 p = 1.979057015 + 2.5 Combine like terms: 1.979057015 + 2.5 = 4.479057015 p = 4.479057015 Simplifying p = 4.479057015

Subproblem 2

p + -2.5 = -1.979057015 Simplifying p + -2.5 = -1.979057015 Reorder the terms: -2.5 + p = -1.979057015 Solving -2.5 + p = -1.979057015 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + p = -1.979057015 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + p = -1.979057015 + 2.5 p = -1.979057015 + 2.5 Combine like terms: -1.979057015 + 2.5 = 0.520942985 p = 0.520942985 Simplifying p = 0.520942985

Solution

The solution to the problem is based on the solutions from the subproblems. p = {4.479057015, 0.520942985}

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