(x+3)(x-4)=1445

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Solution for (x+3)(x-4)=1445 equation:


Simplifying
(x + 3)(x + -4) = 1445

Reorder the terms:
(3 + x)(x + -4) = 1445

Reorder the terms:
(3 + x)(-4 + x) = 1445

Multiply (3 + x) * (-4 + x)
(3(-4 + x) + x(-4 + x)) = 1445
((-4 * 3 + x * 3) + x(-4 + x)) = 1445
((-12 + 3x) + x(-4 + x)) = 1445
(-12 + 3x + (-4 * x + x * x)) = 1445
(-12 + 3x + (-4x + x2)) = 1445

Combine like terms: 3x + -4x = -1x
(-12 + -1x + x2) = 1445

Solving
-12 + -1x + x2 = 1445

Solving for variable 'x'.

Reorder the terms:
-12 + -1445 + -1x + x2 = 1445 + -1445

Combine like terms: -12 + -1445 = -1457
-1457 + -1x + x2 = 1445 + -1445

Combine like terms: 1445 + -1445 = 0
-1457 + -1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1457' to each side of the equation.
-1457 + -1x + 1457 + x2 = 0 + 1457

Reorder the terms:
-1457 + 1457 + -1x + x2 = 0 + 1457

Combine like terms: -1457 + 1457 = 0
0 + -1x + x2 = 0 + 1457
-1x + x2 = 0 + 1457

Combine like terms: 0 + 1457 = 1457
-1x + x2 = 1457

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 1457 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 1457 + 0.25

Combine like terms: 1457 + 0.25 = 1457.25
0.25 + -1x + x2 = 1457.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 1457.25

Calculate the square root of the right side: 38.173943993

Break this problem into two subproblems by setting 
(x + -0.5) equal to 38.173943993 and -38.173943993.

Subproblem 1

x + -0.5 = 38.173943993 Simplifying x + -0.5 = 38.173943993 Reorder the terms: -0.5 + x = 38.173943993 Solving -0.5 + x = 38.173943993 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 38.173943993 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 38.173943993 + 0.5 x = 38.173943993 + 0.5 Combine like terms: 38.173943993 + 0.5 = 38.673943993 x = 38.673943993 Simplifying x = 38.673943993

Subproblem 2

x + -0.5 = -38.173943993 Simplifying x + -0.5 = -38.173943993 Reorder the terms: -0.5 + x = -38.173943993 Solving -0.5 + x = -38.173943993 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -38.173943993 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -38.173943993 + 0.5 x = -38.173943993 + 0.5 Combine like terms: -38.173943993 + 0.5 = -37.673943993 x = -37.673943993 Simplifying x = -37.673943993

Solution

The solution to the problem is based on the solutions from the subproblems. x = {38.673943993, -37.673943993}

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