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

Solve each equation by factoring.

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.

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