# Sir Galahad

Popular questions and responses by Sir Galahad-
## algebra

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

*asked on November 27, 2006* -
## algebra

Solve the quadratic equation: 2x(squared)+6x+12=0 I know you have to find two numbers that =24 (2 times 12) and have a sum of 6. But I can't think of any! Can someone please help? Use the quadratic. And this problem has no real answers, they are imaginary.

*asked on December 9, 2006* -
## algebra

Can someone assist help me with the following? Simplify the expression: 6-(8+3i) The answer is -2-3i, but I do not understand why. Think of the -sign outside of the parantheses as a -1. So, you need the distributive law and multiply -1 x 8 = -8. Then -1 x

*asked on December 7, 2006*