Sir Galahad

Popular questions and responses by Sir Galahad
  1. 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
  2. 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
  3. 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