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Question 1. Simplify the following: what is the cube root of 256

 

Question 2. Rationalize the denominator: square root of 10/5

 

Question 3. Find the discriminant of the following: -4x+1+4x^2

 

Question 4. Find the discriminant of the following: 1+3x^2-11x

 Apr 25, 2019
 #1
avatar+106535 
+1

1.  ∛256  =  ∛[ 64 * 4 ]  = ∛64 * ∛4   = 4∛4

 

2.   √ [10 / 5 ]   =  √10 / √5  =   √10 * √5  /  [ √5 * √5 ]  =  √50 / 5   

 

3.  Rewrite as   4x^2 - 4x + 1   .....in the form  ax^2 + bx + c.....the discriminant = b^2 - 4ac....so

      (-4)^2 - 4(4)(1)  =   16 - 16  = 0

 

4.  Rewrite as   3x^2 -11x + 1......discriminant  =   (-1)^2 - 4(3)(1)  =  121 - 12  = 109

 

 

 

cool cool cool

 Apr 25, 2019
 #2
avatar+299 
+2

Thank you so much CPhill.

Nerd123  Apr 25, 2019
 #3
avatar+106535 
+1

OK...

 

cool cool cool

CPhill  Apr 26, 2019

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