exam Maths Puzzle Numerical Ability

Can you please help me by completing the square?
2x^2-4x-3=0

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exam Other Question

Please help!
w(w+2)^2+8(w+2)^2
Thank you Could you tell me how to solve the following question: For a particular salmon population, the relationship between the number "S" of spawner and the number "R" of offspring that s