exam Maths Puzzle Numerical Ability

Hello,


I need help finding the equation of the axis of symmetry and the coordinates of the vertex of the graph of: y=2x^2+4x-5


Thank you

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exam Other Question
a collection of 50 coins is worth $5.20. There are 12 more nickels than dimes, and the rest of the coins are quarters. How many coins of each type are in the collection? Thank you factor 12x^3y^3-6x^4y^2