25x^2-90x=-81

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


Simplifying
25x2 + -90x = -81

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

Solving
-90x + 25x2 = -81

Solving for variable 'x'.

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

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

Factor a trinomial.
(9 + -5x)(9 + -5x) = 0

Subproblem 1

Set the factor '(9 + -5x)' equal to zero and attempt to solve: Simplifying 9 + -5x = 0 Solving 9 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -5x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -5x = 0 + -9 -5x = 0 + -9 Combine like terms: 0 + -9 = -9 -5x = -9 Divide each side by '-5'. x = 1.8 Simplifying x = 1.8

Subproblem 2

Set the factor '(9 + -5x)' equal to zero and attempt to solve: Simplifying 9 + -5x = 0 Solving 9 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -5x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -5x = 0 + -9 -5x = 0 + -9 Combine like terms: 0 + -9 = -9 -5x = -9 Divide each side by '-5'. x = 1.8 Simplifying x = 1.8

Solution

x = {1.8, 1.8}

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