(x+1)(x+1)-81=0

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Solution for (x+1)(x+1)-81=0 equation:


Simplifying
(x + 1)(x + 1) + -81 = 0

Reorder the terms:
(1 + x)(x + 1) + -81 = 0

Reorder the terms:
(1 + x)(1 + x) + -81 = 0

Multiply (1 + x) * (1 + x)
(1(1 + x) + x(1 + x)) + -81 = 0
((1 * 1 + x * 1) + x(1 + x)) + -81 = 0
((1 + 1x) + x(1 + x)) + -81 = 0
(1 + 1x + (1 * x + x * x)) + -81 = 0
(1 + 1x + (1x + x2)) + -81 = 0

Combine like terms: 1x + 1x = 2x
(1 + 2x + x2) + -81 = 0

Reorder the terms:
1 + -81 + 2x + x2 = 0

Combine like terms: 1 + -81 = -80
-80 + 2x + x2 = 0

Solving
-80 + 2x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-10 + -1x)(8 + -1x) = 0

Subproblem 1

Set the factor '(-10 + -1x)' equal to zero and attempt to solve: Simplifying -10 + -1x = 0 Solving -10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -1x = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1x = 0 + 10 -1x = 0 + 10 Combine like terms: 0 + 10 = 10 -1x = 10 Divide each side by '-1'. x = -10 Simplifying x = -10

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {-10, 8}

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