81x^2=-54x+91

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Solution for 81x^2=-54x+91 equation:


Simplifying
81x2 = -54x + 91

Reorder the terms:
81x2 = 91 + -54x

Solving
81x2 = 91 + -54x

Solving for variable 'x'.

Reorder the terms:
-91 + 54x + 81x2 = 91 + -54x + -91 + 54x

Reorder the terms:
-91 + 54x + 81x2 = 91 + -91 + -54x + 54x

Combine like terms: 91 + -91 = 0
-91 + 54x + 81x2 = 0 + -54x + 54x
-91 + 54x + 81x2 = -54x + 54x

Combine like terms: -54x + 54x = 0
-91 + 54x + 81x2 = 0

Factor a trinomial.
(-13 + -9x)(7 + -9x) = 0

Subproblem 1

Set the factor '(-13 + -9x)' equal to zero and attempt to solve: Simplifying -13 + -9x = 0 Solving -13 + -9x = 0 Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + -9x = 0 + 13 Combine like terms: -13 + 13 = 0 0 + -9x = 0 + 13 -9x = 0 + 13 Combine like terms: 0 + 13 = 13 -9x = 13 Divide each side by '-9'. x = -1.444444444 Simplifying x = -1.444444444

Subproblem 2

Set the factor '(7 + -9x)' equal to zero and attempt to solve: Simplifying 7 + -9x = 0 Solving 7 + -9x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -9x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -9x = 0 + -7 -9x = 0 + -7 Combine like terms: 0 + -7 = -7 -9x = -7 Divide each side by '-9'. x = 0.7777777778 Simplifying x = 0.7777777778

Solution

x = {-1.444444444, 0.7777777778}

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