exam Maths Puzzle Numerical Ability

How do you complete the square for (((2x^2+3x+4=0)))?

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exam Other Question

given f(x) = square root of x-4 and g(x) = square root of x-2

find

g/f (x)

domain of g/f x need to put this in lowest terms but it may already be can someone help with this...64y^3+27z^3/4y+3z