QuestionAugust 26, 2025

Solve for x. 81x^2-64=0 Write your answers as integers or simplified fractions. x= square or x= square

Solve for x. 81x^2-64=0 Write your answers as integers or simplified fractions. x= square or x= square
Solve for x.
81x^2-64=0
Write your answers as integers or simplified fractions.
x= square  or x= square

Solution
4.7(352 votes)

Answer

x = \frac{8}{9} or x = -\frac{8}{9} Explanation 1. Isolate the quadratic term Add 64 to both sides: 81x^2 = 64. 2. Solve for x^2 Divide both sides by 81: x^2 = \frac{64}{81}. 3. Take the square root x = \pm \sqrt{\frac{64}{81}} = \pm \frac{\sqrt{64}}{\sqrt{81}} = \pm \frac{8}{9}.

Explanation

1. Isolate the quadratic term<br /> Add 64 to both sides: $81x^2 = 64$.<br />2. Solve for $x^2$<br /> Divide both sides by 81: $x^2 = \frac{64}{81}$.<br />3. Take the square root<br /> $x = \pm \sqrt{\frac{64}{81}} = \pm \frac{\sqrt{64}}{\sqrt{81}} = \pm \frac{8}{9}$.
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