(x+4)(x-4)-(x-3)=-1

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Solution for (x+4)(x-4)-(x-3)=-1 equation:


Simplifying
(x + 4)(x + -4) + -1(x + -3) = -1

Reorder the terms:
(4 + x)(x + -4) + -1(x + -3) = -1

Reorder the terms:
(4 + x)(-4 + x) + -1(x + -3) = -1

Multiply (4 + x) * (-4 + x)
(4(-4 + x) + x(-4 + x)) + -1(x + -3) = -1
((-4 * 4 + x * 4) + x(-4 + x)) + -1(x + -3) = -1
((-16 + 4x) + x(-4 + x)) + -1(x + -3) = -1
(-16 + 4x + (-4 * x + x * x)) + -1(x + -3) = -1
(-16 + 4x + (-4x + x2)) + -1(x + -3) = -1

Combine like terms: 4x + -4x = 0
(-16 + 0 + x2) + -1(x + -3) = -1
(-16 + x2) + -1(x + -3) = -1

Reorder the terms:
-16 + x2 + -1(-3 + x) = -1
-16 + x2 + (-3 * -1 + x * -1) = -1
-16 + x2 + (3 + -1x) = -1

Reorder the terms:
-16 + 3 + -1x + x2 = -1

Combine like terms: -16 + 3 = -13
-13 + -1x + x2 = -1

Solving
-13 + -1x + x2 = -1

Solving for variable 'x'.

Reorder the terms:
-13 + 1 + -1x + x2 = -1 + 1

Combine like terms: -13 + 1 = -12
-12 + -1x + x2 = -1 + 1

Combine like terms: -1 + 1 = 0
-12 + -1x + x2 = 0

Factor a trinomial.
(-3 + -1x)(4 + -1x) = 0

Subproblem 1

Set the factor '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-3, 4}

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