5p^2+3p-7=0

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Solution for 5p^2+3p-7=0 equation:


Simplifying
5p2 + 3p + -7 = 0

Reorder the terms:
-7 + 3p + 5p2 = 0

Solving
-7 + 3p + 5p2 = 0

Solving for variable 'p'.

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

Divide each side by '5'.
-1.4 + 0.6p + p2 = 0

Move the constant term to the right:

Add '1.4' to each side of the equation.
-1.4 + 0.6p + 1.4 + p2 = 0 + 1.4

Reorder the terms:
-1.4 + 1.4 + 0.6p + p2 = 0 + 1.4

Combine like terms: -1.4 + 1.4 = 0.0
0.0 + 0.6p + p2 = 0 + 1.4
0.6p + p2 = 0 + 1.4

Combine like terms: 0 + 1.4 = 1.4
0.6p + p2 = 1.4

The p term is 0.6p.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6p + 0.09 + p2 = 1.4 + 0.09

Reorder the terms:
0.09 + 0.6p + p2 = 1.4 + 0.09

Combine like terms: 1.4 + 0.09 = 1.49
0.09 + 0.6p + p2 = 1.49

Factor a perfect square on the left side:
(p + 0.3)(p + 0.3) = 1.49

Calculate the square root of the right side: 1.220655562

Break this problem into two subproblems by setting 
(p + 0.3) equal to 1.220655562 and -1.220655562.

Subproblem 1

p + 0.3 = 1.220655562 Simplifying p + 0.3 = 1.220655562 Reorder the terms: 0.3 + p = 1.220655562 Solving 0.3 + p = 1.220655562 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + p = 1.220655562 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + p = 1.220655562 + -0.3 p = 1.220655562 + -0.3 Combine like terms: 1.220655562 + -0.3 = 0.920655562 p = 0.920655562 Simplifying p = 0.920655562

Subproblem 2

p + 0.3 = -1.220655562 Simplifying p + 0.3 = -1.220655562 Reorder the terms: 0.3 + p = -1.220655562 Solving 0.3 + p = -1.220655562 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + p = -1.220655562 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + p = -1.220655562 + -0.3 p = -1.220655562 + -0.3 Combine like terms: -1.220655562 + -0.3 = -1.520655562 p = -1.520655562 Simplifying p = -1.520655562

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.920655562, -1.520655562}

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