0
Turn it around for my convenience.
81X^2 - 25 = 0
add 25 to each side
81X^2 = 25
divide both sides by 81
X^2 = 25/81
take square root both sides
X = sqrt(25/81
express as
X = sqrt(25)/sqrt(81)
do it
X = 5/9
----------------check in original equation
81(5/9)^2 - 25 = 0
81(25/81) - 25 = 0
25 - 25 = 0
0 = 0
checks
Still curious? Ask our experts.
Chat with our AI personalities
BeauYou're doing better than you think!
Chat with Beau
CoachSuccess isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach
ReneChange my mind. I dare you.
Chat with ReneAdd your answer:
Earn +20 ptsQ: What is 0 equals 81x squared-25?
Write your answer...
Submit
Still have questions?
Continue Learning about Math & Arithmetic
4x - 10 plus 5x equals 71?
4x - 10 + 5x = 719x = 81x = 9
How do you factor 81x-1?
82
What is the solution to x to the fourth power minus eighty one equals zero?
x4 - 81 = 0x4 = 81x = 3
What is true 15 plus 0 equals 0 15-0 equals 0 15 percent 0 equals 0 0 percent 15 equals 0?
15 percent 0 equals 0; 0 percent 15 equals 0. Both the above are true
Ab equals 0 if and only if a equals 0 or b equals 0?
yes
Trending Questions
What is seven times nine?
Are two circles congruent if you reflect them?
What is the selling price of dairy milk i selling price to consumers ii selling price to retailer iii selling price to wholesaler?
What numbers that add up to 8?
.030 is equal to how many inches?
How many yards are there in 110 meters?
Is 84 degrees Fahrenheit cold?
What is 20 as a percent of 50?
Which triangle has a 45 degree angle?
Is 8 prim or composite?
What is 8.7 divided by 17.4 equal?
What are good True or False dog questions?
How do you decide if a number is a multiple of another number?
How many square feet in 2900 millimetre?
What do you call z in an axis?
Write five hundred billion?
Can you get cut in half by a seatbelt?
35 nearest to 10?
How do you inscribe a square?
What is it called when you connect points of equal temperature?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.