Homework Help Forum: math

Posted by jessica on Thursday, November 5, 2009 at 10:04pm.

Solve the quadratic equation. 3x^2 - 15x + 18 = 0

• math - Reiny, Thursday, November 5, 2009 at 11:06pm

  First of all, I can see a common factor of 3, divide each term by 3. The result factors Hint: one of the factors is x-1

  
  

• math - Zach, Thursday, November 5, 2009 at 11:16pm

  3x^2-15x+18=0 -18 3x^2-15x=-18 square root 3x-15x=4.2426406871192851464050661726291 divide by 3 x-15x=1.4142165323730950488016887242097 divide by -15 x+x=-0.094280904158206336596779248280647 -x x=-0.094280904158206336596779248280647x

  
  

• math - Reiny, Thursday, November 5, 2009 at 11:26pm

  I have no clue what Zach is doing. As I said above 3x^2 - 15x + 18 = 0 x^2 - 5x + 6 = 0 (x-1)(x-6) = 0 x = 1 or x = 6

  
  

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