2p^2-7=7p

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Solution for 2p^2-7=7p equation:


Simplifying
2p2 + -7 = 7p

Reorder the terms:
-7 + 2p2 = 7p

Solving
-7 + 2p2 = 7p

Solving for variable 'p'.

Reorder the terms:
-7 + -7p + 2p2 = 7p + -7p

Combine like terms: 7p + -7p = 0
-7 + -7p + 2p2 = 0

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

Divide each side by '2'.
-3.5 + -3.5p + p2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + -3.5p + 3.5 + p2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + -3.5p + p2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -3.5p + p2 = 0 + 3.5
-3.5p + p2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
-3.5p + p2 = 3.5

The p term is -3.5p.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5p + 3.0625 + p2 = 3.5 + 3.0625

Reorder the terms:
3.0625 + -3.5p + p2 = 3.5 + 3.0625

Combine like terms: 3.5 + 3.0625 = 6.5625
3.0625 + -3.5p + p2 = 6.5625

Factor a perfect square on the left side:
(p + -1.75)(p + -1.75) = 6.5625

Calculate the square root of the right side: 2.561737691

Break this problem into two subproblems by setting 
(p + -1.75) equal to 2.561737691 and -2.561737691.

Subproblem 1

p + -1.75 = 2.561737691 Simplifying p + -1.75 = 2.561737691 Reorder the terms: -1.75 + p = 2.561737691 Solving -1.75 + p = 2.561737691 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + p = 2.561737691 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + p = 2.561737691 + 1.75 p = 2.561737691 + 1.75 Combine like terms: 2.561737691 + 1.75 = 4.311737691 p = 4.311737691 Simplifying p = 4.311737691

Subproblem 2

p + -1.75 = -2.561737691 Simplifying p + -1.75 = -2.561737691 Reorder the terms: -1.75 + p = -2.561737691 Solving -1.75 + p = -2.561737691 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + p = -2.561737691 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + p = -2.561737691 + 1.75 p = -2.561737691 + 1.75 Combine like terms: -2.561737691 + 1.75 = -0.811737691 p = -0.811737691 Simplifying p = -0.811737691

Solution

The solution to the problem is based on the solutions from the subproblems. p = {4.311737691, -0.811737691}

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