exam Maths Puzzle Numerical Ability

Solve by completing the square. 2x^2 - 6x - 3 = 0

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exam Other Question

please!

if f(3/x)=2x-1/3

compute

f(x)=? Which of the ordered pairs
(-7, 2), (1, 0), (-3, -1), (-23, 6)
are solutions for the equation x + 4y = 1?

Thanks so much for your valuable time!! No book.