exam Maths Puzzle Numerical Ability

Simplify each expression

-5 + 5(x + 4)

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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 how do you express f(x)=-3(x-2)^2+5 in standard form? What formula do you use?