Multiply Out the Brackets and Simplify
1) $( x - y ) ( x + y ) - ( x + 2 ) ( x - y + 3 )$

question 2

Multiple Choice

Multiply out the brackets and simplify
1) $( x - y ) ( x + y ) - ( x + 2 ) ( x - y + 3 )$

• A) \(x y - y ^ { 2 } - 5 x + 2 y - 6\)
• B) \(x y - 6 + 5 x + y ^ { 2 }\)
• C) \(x + 2 y - 6 + 2 x - y ^ { 2 }\)
• D) \(x - 2 y - 6 - x y - y ^ { 2 }\)
• E) \(2 x y + 5 x - 6 + y ^ { 2 }\)

Distinguish between different stages and functions of sleep.

Explain the concept of subliminal perception and its implications.

Understand the biological basis and regulation of circadian rhythms.

Describe the function and effects of melatonin in sleep regulation.

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