Wednesday

January 28, 2015

January 28, 2015

Posted by **Sir Galahad** on Monday, November 27, 2006 at 5:16pm.

7x²-243=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)

7x^2=243 (Combine like terms)

x^2=34.71428571 (Divide each side by 7/simplify)

-34.71428571+x^2=34.71428571 +-34.71428571(reorder)

-34.71428571+x^2=0.00000000

Answer: The solution to this equation can not be determined.

**Answer this Question**

**Related Questions**

Math - Find X 27^4x-2=243^3x+6 Please explain how to do it. Thanks 27^(4x-2)=243...

Math - Find X 27^4x-2=243^3x=6 Please Explain Thanks Is this a repeat of the ...

Algebra II - Please check answers: Use the equation of the exponential function ...

maths - for this quadratic equation: y2-4y-16 = 0 which two options are correct ...

Algebra2 - i was wondering if someone could check the answer i got for this math...

math - 5 people measured a metal bar using the same measuing instrument,but each...

MATH URGENT - The prime factorization of 243 is 3*3*3*3*3. Write 243 as the ...

maths - for this quadratic equation: y2-4y-16 = 0 which two options are correct ...

algebra - 16. Solve y = log3243. A. y = 0 C. y = 5 B. y = 3 D. y = 243 3. Which ...

bobpursly,.math - Ok, assume it equals zero. 2x + 3y -6=0 subtract 3y from each ...