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Hello there, here are the questions and answers (which i wrote) Need to check the answers so please help :)

Factorize:

1) X^2  - 7X + 12

Answer i wrote: (X - 4) (X - 3)

 

2) X^2 + 5X - 6

Answer i wrote: (X + 6) (X - 1)

 

3) 3X^2 - X - 2

Answer i wrote: (3x - 2) (x + 1)

 

4) 25X^2 - 30X + 9

Answer i wrote: (5X - 3) (5X -3)

 

5) 36X^2 - 9Y^2

Answer i wrote: Square root both 36x^2 and 9y^2

=(6X - 3Y) (6X + 3Y) 

That's it.

 Feb 22, 2019
 #1
avatar+23064 
+3

3)

3X^2 - X - 2

Answer i wrote: (3x - 2) (x + 1) no!

 

3X2 - X - 2 = (3x + 2) (x - 1)

 

laugh

 Feb 22, 2019
 #3
avatar
+1

Thanks!!

Guest Feb 22, 2019
 #2
avatar+5782 
+1

1) X^2  - 7X + 12

Answer i wrote: (X - 4) (X - 3)

correct

2) X^2 + 5X - 6

Answer i wrote: (X + 6) (X - 1)

correct

3) 3X^2 - X - 2

Answer i wrote: (3x - 2) (x + 1)

incorrect (check signs)

4) 25X^2 - 30X + 9

Answer i wrote: (5X - 3) (5X -3)

correct

5) 36X^2 - 9Y^2

Answer i wrote: Square root both 36x^2 and 9y^2

=(6X - 3Y) (6X + 3Y) 

correct 

 Feb 22, 2019

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