Since "a" is on the top and the bottom, you can simplify that


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Answer:
Half a pound.
Step-by-step explanation:
To find the number of pounds he ate, multiply the fractions.

He ate 1/2 a pound.
Answer:
Factoring
Step-by-step explanation:
(x+4)² = 15
x² + 8x + 16 = 15
x² + 8x + 1 = 0

I hope this helps you :)