Answers created by Odlisss

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• Determine if x^2-100 is a difference of 2 squares, if so factor it. ?
  
• How do you work out the x intercepts of the equation #y=2(x-4)^2-3# by factorising? Thanks!
  
• Differentiate #\frac{r}{\sqrt{r^2+5}}# ?
  
• Donna bought 4.356 pounds of cheese. What is the value of each of the digits in 4.356?
  
• 70,500 in scientific notation?
  
• How do you solve by completing the square #a^2 -6a-5=0#?
  
• How do you simplify #(x^3+x^2-2x)/(x^3+2x^2-x-2)#?
  
• How do you solve #(2/5)x + (1/5)y = -1# and #x + (2/5)y = -(8/5)#?
  
• How do you simplify #9(x - 2) –3(x – 1)#?