
to find 'x' you add 243 to both sides
so:
3x^2=243
divide both sides by 3
3x^2/3 = 243/3
x^2 = 81
then take the square root of both sides
so x=9
hope that helps, be sure to plug your numbers back in to check it take 9 and plug it in for x ::
3(9)^2243
3(81)243
243243=0
0=0posted by Brittany

its 3x square root of that  243
idk if that's how u work it.
idk what this is calledposted by katelyn

its not finding the x!
posted by katelyn
Respond to this Question
Similar Questions

algebra
Solve each equation by factoring. 7x²243=0 I know I'm supposed to add 243 to the other side but don't know what else to do. Divide maybe? Thanks in advance. 243+7x^2= 0 (reorder) 243+243+7x^2 = 0+243 (add 243 to both sides) 
Math
Find X 27^4x2=243^3x+6 Please explain how to do it. Thanks 27^(4x2)=243^(3x+6) Notice that 27 and 243 are both multiples of 3 Changing them.. (3^4)^(4x2)=(3^6)^(3x+6) 3^4(4x2)= 3^6(3x+6) taking the log base 3 of each side. 
math
5 people measured a metal bar using the same measuing instrument,but each read the scale to a different level of accuracy.their 5 answers are show below.4 of them are correct(to the chosen level of accuracy),but one is not.which 
Math
Find X 27^4x2=243^3x=6 Please Explain Thanks Is this a repeat of the problem you posted earlier? If so, it should be 274x2 = 2433x+6 You might try it the hard way. (4x2)*log 27 = (3x+6)*log (243) Solve for x. I get 12. Post 
MATH URGENT
The prime factorization of 243 is 3*3*3*3*3. Write 243 as the product of two powers of 3 in as many ways as possible. Thank you 
Math
Geometric series: Finite and infinite n=5 a1=243 r=2/3 i=1 This is the equation 243(2/3)^i My answer is 633 n=infinity sign a1=5 r=1/4 i=1 The equation 5(1/4)^i1 I think its undefined 
math
A score of 243 is a "basic" reading level. Scores for a random sample of 3000 students had a xbar = 250 with a standard error 1.0 The 99% confidence interval for the mean score all students in the city is 247.4 to 252.6. Ques: Is 
Algebra
Write a function rule to represent the situation: The volume, V, remaining in a 243 ft^3 (cubed) pile of gravel decreases by .2 ft^3 (cubed) with each shovelful, s, of gravel spread in a walkway. I think: V=243 ft^3  .2 ft^3s 
math i need help
What is the simplified form of each expression? 1. Alg 1 (1 point) A.Alg 1 B.n4 *** C.n8 D.n12 i think it's B 
math
A score of 243 is a "basic" reading level. Scores for a random sample of 3000 students had a xbar = 250 with a standard error 1.0 The 99% confidence interval for the mean score all students in the city is 247.4 to 252.6. Ques: Is