81x^2+72x+16=0

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Solution for 81x^2+72x+16=0 equation:


Simplifying
81x2 + 72x + 16 = 0

Reorder the terms:
16 + 72x + 81x2 = 0

Solving
16 + 72x + 81x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(4 + 9x)(4 + 9x) = 0

Subproblem 1

Set the factor '(4 + 9x)' equal to zero and attempt to solve: Simplifying 4 + 9x = 0 Solving 4 + 9x = 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 + 9x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 9x = 0 + -4 9x = 0 + -4 Combine like terms: 0 + -4 = -4 9x = -4 Divide each side by '9'. x = -0.4444444444 Simplifying x = -0.4444444444

Subproblem 2

Set the factor '(4 + 9x)' equal to zero and attempt to solve: Simplifying 4 + 9x = 0 Solving 4 + 9x = 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 + 9x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 9x = 0 + -4 9x = 0 + -4 Combine like terms: 0 + -4 = -4 9x = -4 Divide each side by '9'. x = -0.4444444444 Simplifying x = -0.4444444444

Solution

x = {-0.4444444444, -0.4444444444}

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