Practice Page
Directions: Determine if the following equations are identities. Show your work.

1.
Determine whether
x2 - 24 = (x + 4)(x - 6) - 2x    is an identity.
IDpic1
       Choose:
 
Identity
Not identity

 


2.
Determine whether    n2 + 9 = ( n + 3i )( n - 3i )
is an identity, where "i " is the imaginary unit.
idpic3
       Choose:
 
Identity
Not identity



3.
Determine whether   (a2 + 3b)(a2 - 4b) = a4 - 12b2    is an identity.
idpic2
       Choose:
 
Identity
Not identity



4.
Determine whether   m2 - m = (m - 5)(m + 4) - 20   
is an identity.
idpic4
       Choose:
 
Identity
Not identity



5.
Determine whether
(x + y)(2y + 3) = y(2x + 2y+ 3) + 3x
is an identity.
idpic5
       Choose:
 
Identity
Not identity



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