x^2+81-8x-90+25=0

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Solution for x^2+81-8x-90+25=0 equation:


Simplifying
x2 + 81 + -8x + -90 + 25 = 0

Reorder the terms:
81 + -90 + 25 + -8x + x2 = 0

Combine like terms: 81 + -90 = -9
-9 + 25 + -8x + x2 = 0

Combine like terms: -9 + 25 = 16
16 + -8x + x2 = 0

Solving
16 + -8x + x2 = 0

Solving for variable 'x'.

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

Subproblem 1

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

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 = {4, 4}

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