(2x-5)(3x+7)=325

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Solution for (2x-5)(3x+7)=325 equation:


Simplifying
(2x + -5)(3x + 7) = 325

Reorder the terms:
(-5 + 2x)(3x + 7) = 325

Reorder the terms:
(-5 + 2x)(7 + 3x) = 325

Multiply (-5 + 2x) * (7 + 3x)
(-5(7 + 3x) + 2x * (7 + 3x)) = 325
((7 * -5 + 3x * -5) + 2x * (7 + 3x)) = 325
((-35 + -15x) + 2x * (7 + 3x)) = 325
(-35 + -15x + (7 * 2x + 3x * 2x)) = 325
(-35 + -15x + (14x + 6x2)) = 325

Combine like terms: -15x + 14x = -1x
(-35 + -1x + 6x2) = 325

Solving
-35 + -1x + 6x2 = 325

Solving for variable 'x'.

Reorder the terms:
-35 + -325 + -1x + 6x2 = 325 + -325

Combine like terms: -35 + -325 = -360
-360 + -1x + 6x2 = 325 + -325

Combine like terms: 325 + -325 = 0
-360 + -1x + 6x2 = 0

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

Divide each side by '6'.
-60 + -0.1666666667x + x2 = 0

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -0.1666666667x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + -0.1666666667x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -0.1666666667x + x2 = 0 + 60
-0.1666666667x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
-0.1666666667x + x2 = 60

The x term is -0.1666666667x.  Take half its coefficient (-0.08333333335).
Square it (0.006944444447) and add it to both sides.

Add '0.006944444447' to each side of the equation.
-0.1666666667x + 0.006944444447 + x2 = 60 + 0.006944444447

Reorder the terms:
0.006944444447 + -0.1666666667x + x2 = 60 + 0.006944444447

Combine like terms: 60 + 0.006944444447 = 60.006944444447
0.006944444447 + -0.1666666667x + x2 = 60.006944444447

Factor a perfect square on the left side:
(x + -0.08333333335)(x + -0.08333333335) = 60.006944444447

Calculate the square root of the right side: 7.746414941

Break this problem into two subproblems by setting 
(x + -0.08333333335) equal to 7.746414941 and -7.746414941.

Subproblem 1

x + -0.08333333335 = 7.746414941 Simplifying x + -0.08333333335 = 7.746414941 Reorder the terms: -0.08333333335 + x = 7.746414941 Solving -0.08333333335 + x = 7.746414941 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + x = 7.746414941 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + x = 7.746414941 + 0.08333333335 x = 7.746414941 + 0.08333333335 Combine like terms: 7.746414941 + 0.08333333335 = 7.82974827435 x = 7.82974827435 Simplifying x = 7.82974827435

Subproblem 2

x + -0.08333333335 = -7.746414941 Simplifying x + -0.08333333335 = -7.746414941 Reorder the terms: -0.08333333335 + x = -7.746414941 Solving -0.08333333335 + x = -7.746414941 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + x = -7.746414941 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + x = -7.746414941 + 0.08333333335 x = -7.746414941 + 0.08333333335 Combine like terms: -7.746414941 + 0.08333333335 = -7.66308160765 x = -7.66308160765 Simplifying x = -7.66308160765

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.82974827435, -7.66308160765}

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