Directions: Determine if the following equations are identities. Show your work.
1.
Determine whether x2 - 24 = (x + 4)(x - 6) - 2x is an identity.
2.
Determine whether n2 + 9 = ( n + 3i )( n - 3i )
is an identity, where "i " is the imaginary unit.
3.
Determine whether (a2 + 3b)(a2 - 4b) = a4 - 12b2 is an identity.
4.
Determine whether m2 - m = (m - 5)(m + 4) - 20
is an identity.
5.
Determine whether
(x + y)(2y + 3) = y(2x + 2y+ 3) + 3x
is an identity.
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