(25x*x)+90x=-81

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Solution for (25x*x)+90x=-81 equation:


Simplifying
(25x * x) + 90x = -81

Multiply x * x
(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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