(x-3)(x+19)=-27

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Solution for (x-3)(x+19)=-27 equation:


Simplifying
(x + -3)(x + 19) = -27

Reorder the terms:
(-3 + x)(x + 19) = -27

Reorder the terms:
(-3 + x)(19 + x) = -27

Multiply (-3 + x) * (19 + x)
(-3(19 + x) + x(19 + x)) = -27
((19 * -3 + x * -3) + x(19 + x)) = -27
((-57 + -3x) + x(19 + x)) = -27
(-57 + -3x + (19 * x + x * x)) = -27
(-57 + -3x + (19x + x2)) = -27

Combine like terms: -3x + 19x = 16x
(-57 + 16x + x2) = -27

Solving
-57 + 16x + x2 = -27

Solving for variable 'x'.

Reorder the terms:
-57 + 27 + 16x + x2 = -27 + 27

Combine like terms: -57 + 27 = -30
-30 + 16x + x2 = -27 + 27

Combine like terms: -27 + 27 = 0
-30 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + 16x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + 16x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + 16x + x2 = 0 + 30
16x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
16x + x2 = 30

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = 30 + 64

Reorder the terms:
64 + 16x + x2 = 30 + 64

Combine like terms: 30 + 64 = 94
64 + 16x + x2 = 94

Factor a perfect square on the left side:
(x + 8)(x + 8) = 94

Calculate the square root of the right side: 9.695359715

Break this problem into two subproblems by setting 
(x + 8) equal to 9.695359715 and -9.695359715.

Subproblem 1

x + 8 = 9.695359715 Simplifying x + 8 = 9.695359715 Reorder the terms: 8 + x = 9.695359715 Solving 8 + x = 9.695359715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 9.695359715 + -8 Combine like terms: 8 + -8 = 0 0 + x = 9.695359715 + -8 x = 9.695359715 + -8 Combine like terms: 9.695359715 + -8 = 1.695359715 x = 1.695359715 Simplifying x = 1.695359715

Subproblem 2

x + 8 = -9.695359715 Simplifying x + 8 = -9.695359715 Reorder the terms: 8 + x = -9.695359715 Solving 8 + x = -9.695359715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -9.695359715 + -8 Combine like terms: 8 + -8 = 0 0 + x = -9.695359715 + -8 x = -9.695359715 + -8 Combine like terms: -9.695359715 + -8 = -17.695359715 x = -17.695359715 Simplifying x = -17.695359715

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.695359715, -17.695359715}

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