Use the identity for the difference of two squares, a^2-b^2=(a-b)(a+b), and the imaginary number i to create an identity for the
1 answer:
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Step-by-step explanation:
n (U)=2000
n (A)=50% of 2000
=(50÷100)×2000
= 1000
n( B) = 40%
= (40÷100)×2000
= 800
n(AuB)(compliment) = 15%
=(15÷100)×2000
=300
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