3(2p+7)+8p(4p-9)=

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Solution for 3(2p+7)+8p(4p-9)= equation:


Simplifying
3(2p + 7) + 8p(4p + -9) = 0

Reorder the terms:
3(7 + 2p) + 8p(4p + -9) = 0
(7 * 3 + 2p * 3) + 8p(4p + -9) = 0
(21 + 6p) + 8p(4p + -9) = 0

Reorder the terms:
21 + 6p + 8p(-9 + 4p) = 0
21 + 6p + (-9 * 8p + 4p * 8p) = 0
21 + 6p + (-72p + 32p2) = 0

Combine like terms: 6p + -72p = -66p
21 + -66p + 32p2 = 0

Solving
21 + -66p + 32p2 = 0

Solving for variable 'p'.

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

Divide each side by '32'.
0.65625 + -2.0625p + p2 = 0

Move the constant term to the right:

Add '-0.65625' to each side of the equation.
0.65625 + -2.0625p + -0.65625 + p2 = 0 + -0.65625

Reorder the terms:
0.65625 + -0.65625 + -2.0625p + p2 = 0 + -0.65625

Combine like terms: 0.65625 + -0.65625 = 0.00000
0.00000 + -2.0625p + p2 = 0 + -0.65625
-2.0625p + p2 = 0 + -0.65625

Combine like terms: 0 + -0.65625 = -0.65625
-2.0625p + p2 = -0.65625

The p term is -2.0625p.  Take half its coefficient (-1.03125).
Square it (1.063476563) and add it to both sides.

Add '1.063476563' to each side of the equation.
-2.0625p + 1.063476563 + p2 = -0.65625 + 1.063476563

Reorder the terms:
1.063476563 + -2.0625p + p2 = -0.65625 + 1.063476563

Combine like terms: -0.65625 + 1.063476563 = 0.407226563
1.063476563 + -2.0625p + p2 = 0.407226563

Factor a perfect square on the left side:
(p + -1.03125)(p + -1.03125) = 0.407226563

Calculate the square root of the right side: 0.638143058

Break this problem into two subproblems by setting 
(p + -1.03125) equal to 0.638143058 and -0.638143058.

Subproblem 1

p + -1.03125 = 0.638143058 Simplifying p + -1.03125 = 0.638143058 Reorder the terms: -1.03125 + p = 0.638143058 Solving -1.03125 + p = 0.638143058 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.03125' to each side of the equation. -1.03125 + 1.03125 + p = 0.638143058 + 1.03125 Combine like terms: -1.03125 + 1.03125 = 0.00000 0.00000 + p = 0.638143058 + 1.03125 p = 0.638143058 + 1.03125 Combine like terms: 0.638143058 + 1.03125 = 1.669393058 p = 1.669393058 Simplifying p = 1.669393058

Subproblem 2

p + -1.03125 = -0.638143058 Simplifying p + -1.03125 = -0.638143058 Reorder the terms: -1.03125 + p = -0.638143058 Solving -1.03125 + p = -0.638143058 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.03125' to each side of the equation. -1.03125 + 1.03125 + p = -0.638143058 + 1.03125 Combine like terms: -1.03125 + 1.03125 = 0.00000 0.00000 + p = -0.638143058 + 1.03125 p = -0.638143058 + 1.03125 Combine like terms: -0.638143058 + 1.03125 = 0.393106942 p = 0.393106942 Simplifying p = 0.393106942

Solution

The solution to the problem is based on the solutions from the subproblems. p = {1.669393058, 0.393106942}

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